550 Can't check for file existence error

Hello - I'm having issues with the SmartFTP client. Can't figure out why this is occurring. Any assistance greatly appreciated.

[12:38:13] SmartFTP v4.0.1225.0
[12:38:14] Resolving host name "items-uploads.archive.org"
[12:38:14] Connecting to 207.241.226.117 Port: 21
[12:38:14] Connected to items-uploads.archive.org.
[12:38:14] 220-Welcome to Pure-FTPd.
[12:38:14] 220-You are user number 15 of 500 allowed.
[12:38:14] 220-Local time is now 15:38. Server port: 21.
[12:38:14] 220-This is a private system - No anonymous login
[12:38:14] 220-RATIOS ARE ENABLED FOR EVERYONE:
[12:38:14] 220-to download 1 Mb, uploading 6666666 Mb of goodies is mandatory.
[12:38:14] 220 You will be disconnected after 15 minutes of inactivity.
[12:38:14] USER xxx
[12:38:14] 331 User xxx OK. Password required
[12:38:14] PASS (hidden)
[12:38:14] 230-User xxx has group access to: 5000
[12:38:14] 230-This server supports FXP transfers
[12:38:14] 230-You must respect a 6666666:1 (UL/DL) ratio
[12:38:14] 230 OK. Current restricted directory is /
[12:38:14] SYST
[12:38:14] 215 UNIX Type: L8
[12:38:14] Detected Server Type: UNIX
[12:38:14] RTT: 78.474 ms
[12:38:14] FEAT
[12:38:15] 211-Extensions supported:
[12:38:15] EPRT
[12:38:15] IDLE
[12:38:15] MDTM
[12:38:15] SIZE
[12:38:15] REST STREAM
[12:38:15] MLST type*;size*;sizd*;modify*;UNIX.mode*;UNIX.uid*;UNIX.gid*;unique*;
[12:38:15] MLSD
[12:38:15] AUTH TLS
[12:38:15] PBSZ
[12:38:15] PROT
[12:38:15] ESTA
[12:38:15] PASV
[12:38:15] EPSV
[12:38:15] SPSV
[12:38:15] ESTP
[12:38:15] 211 End.
[12:38:15] Detected Server Software: PureFTPd
[12:38:15] PWD
[12:38:15] 257 "/" is your current location
[12:38:15] TYPE A
[12:38:15] 200 TYPE is now ASCII
[12:38:15] PASV
[12:38:15] 227 Entering Passive Mode (207,241,226,117,92,151)
[12:38:15] Opening data connection to 207.241.226.117 Port: 23703
[12:38:15] MLSD
[12:38:15] 150 Accepted data connection
[12:38:15] 226-Options: -a -l
[12:38:15] 226 4 matches total
[12:38:15] 459 bytes transferred. (5.67 KB/s) (79 ms)
[12:38:20] CWD /TigerBeat1
[12:38:20] 250 OK. Current directory is /TigerBeat1
[12:38:20] PWD
[12:38:20] 257 "/TigerBeat1" is your current location
[12:38:20] PASV
[12:38:20] 227 Entering Passive Mode (207,241,226,117,9,76)
[12:38:20] Opening data connection to 207.241.226.117 Port: 2380
[12:38:20] MLSD
[12:38:20] 150 Accepted data connection
[12:38:20] 221 bytes transferred. (2.73 KB/s) (79 ms)
[12:38:20] 226-Options: -a -l
[12:38:20] 226 2 matches total
[12:38:50] NOOP
[12:38:51] 200 dc.w $4E71
[12:40:27] MLST Tiger Beat.avi
[12:40:27] 550 Can't check for file existence
[12:40:27] The operation has been added to the Transfer Queue. Check the Transfer Queue for the status.
[12:40:29] MLST Tiger Beat.avi
[12:40:29] 550 Can't check for file existence
[12:40:59] MLST Tiger Beat.avi
[12:40:59] 550 Can't check for file existence
[12:41:30] MLST Tiger Beat.avi
[12:41:30] 550 Can't check for file existence
[12:42:01] MLST Tiger Beat.avi
[12:42:01] 550 Can't check for file existence
[12:43:25] MLST Tiger Beat.avi
[12:43:25] 550 Can't check for file existence
[12:43:25] The operation has been added to the Transfer Queue. Start the Transfer Queue to process it.
[12:43:47] MLST Tiger Beat.avi
[12:43:47] 550 Can't check for file existence
[12:44:17] MLST Tiger Beat.avi
[12:44:17] 550 Can't check for file existence
[12:44:47] MLST Tiger Beat.avi
[12:44:48] 550 Can't check for file existence
[12:45:17] MLST Tiger Beat.avi
[12:45:17] 550 Can't check for file existence
[12:45:47] MLST Tiger Beat.avi
[12:45:47] 550 Can't check for file existence
[12:46:18] MLST Tiger Beat.avi
[12:46:18] 550 Can't check for file existence
[12:46:52] MLST Tiger Beat.avi
[12:46:52] 550 Can't check for file existence
[12:46:52] The operation has been added to the Transfer Queue. Check the Transfer Queue for the status.
[12:46:52] MLST Tiger Beat.avi
[12:46:52] 550 Can't check for file existence
[12:47:13] QUIT
[12:47:13] 221-Goodbye. You uploaded 0 and downloaded 0 kbytes.
[12:47:13] 221 Logout.
[12:47:13] Client closed the connection.
[12:47:13] Resolving host name "items-uploads.archive.org"
[12:47:13] Connecting to 207.241.226.117 Port: 21
[12:47:13] Connected to items-uploads.archive.org.
[12:47:13] 220-Welcome to Pure-FTPd.
[12:47:13] 220-You are user number 14 of 500 allowed.
[12:47:13] 220-Local time is now 15:47. Server port: 21.
[12:47:13] 220-This is a private system - No anonymous login
[12:47:13] 220-RATIOS ARE ENABLED FOR EVERYONE:
[12:47:13] 220-to download 1 Mb, uploading 6666666 Mb of goodies is mandatory.
[12:47:13] 220 You will be disconnected after 15 minutes of inactivity.
[12:47:13] USER xxx
[12:47:13] 331 User xxx OK. Password required
[12:47:13] PASS (hidden)
[12:47:13] 230-User xxx has group access to: 5000
[12:47:13] 230-This server supports FXP transfers
[12:47:13] 230-You must respect a 6666666:1 (UL/DL) ratio
[12:47:13] 230 OK. Current restricted directory is /
[12:47:13] SYST
[12:47:13] 215 UNIX Type: L8
[12:47:13] Detected Server Type: UNIX
[12:47:13] RTT: 77.756 ms
[12:47:13] FEAT
[12:47:13] 211-Extensions supported:
[12:47:13] EPRT
[12:47:13] IDLE
[12:47:13] MDTM
[12:47:13] SIZE
[12:47:13] REST STREAM
[12:47:13] MLST type*;size*;sizd*;modify*;UNIX.mode*;UNIX.uid*;UNIX.gid*;unique*;
[12:47:13] MLSD
[12:47:13] AUTH TLS
[12:47:13] PBSZ
[12:47:13] PROT
[12:47:13] ESTA
[12:47:13] PASV
[12:47:13] EPSV
[12:47:13] SPSV
[12:47:13] ESTP
[12:47:13] 211 End.
[12:47:13] Detected Server Software: PureFTPd
[12:47:13] PWD
[12:47:14] 257 "/" is your current location
[12:47:24] CWD /TigerBeat1
[12:47:24] 250 OK. Current directory is /TigerBeat1
[12:47:24] PWD
[12:47:24] 257 "/TigerBeat1" is your current location
[12:47:24] MLST Tiger Beat.avi
[12:47:24] 550 Can't check for file existence
[12:47:25] The operation has been added to the Transfer Queue. Check the Transfer Queue for the status.
[12:47:26] MLST Tiger Beat.avi
[12:47:26] 550 Can't check for file existence
[12:47:56] MLST Tiger Beat.avi
[12:47:56] 550 Can't check for file existence
[12:48:17] CWD /
[12:48:17] 250 OK. Current directory is /
[12:48:17] PWD
[12:48:17] 257 "/" is your current location
[12:48:17] MLST Tiger Beat.avi
[12:48:17] 550 Can't check for file existence
[12:48:17] The operation has been added to the Transfer Queue. Check the Transfer Queue for the status.
[12:48:19] MLST Tiger Beat.avi
[12:48:19] 550 Can't check for file existence
[12:48:46] CWD /BuglarsBliss
[12:48:47] 250 OK. Current directory is /BuglarsBliss
[12:48:47] PWD
[12:48:47] 257 "/BuglarsBliss" is your current location
[12:48:47] TYPE A
[12:48:47] 200 TYPE is now ASCII
[12:48:47] PASV
[12:48:47] 227 Entering Passive Mode (207,241,226,117,219,208)
[12:48:47] Opening data connection to 207.241.226.117 Port: 56272
[12:48:47] MLSD
[12:48:47] 150 Accepted data connection
[12:48:47] 226-Options: -a -l
[12:48:47] 226 2 matches total
[12:48:47] 221 bytes transferred. (2.80 KB/s) (77 ms)
[12:48:47] MLST Burglar's Bliss.avi
[12:48:47] 550 Can't check for file existence
[12:48:48] The operation has been added to the Transfer Queue. Check the Transfer Queue for the status.
[12:48:48] MLST Burglar's Bliss.avi
[12:48:48] 550 Can't check for file existence
[12:53:21] QUIT
[12:53:21] 221-Goodbye. You uploaded 0 and downloaded 0 kbytes.
[12:53:21] 221 Logout.
[12:53:21] Client closed the connection.
[12:53:25] Resolving host name "items-uploads.archive.org"
[12:53:25] Connecting to 207.241.226.117 Port: 21
[12:53:25] Connected to items-uploads.archive.org.
[12:53:26] 220-Welcome to Pure-FTPd.
[12:53:26] 220-You are user number 17 of 500 allowed.
[12:53:26] 220-Local time is now 15:53. Server port: 21.
[12:53:26] 220-This is a private system - No anonymous login
[12:53:26] 220-RATIOS ARE ENABLED FOR EVERYONE:
[12:53:26] 220-to download 1 Mb, uploading 6666666 Mb of goodies is mandatory.
[12:53:26] 220 You will be disconnected after 15 minutes of inactivity.
[12:53:26] USER xxx
[12:53:26] 331 User xxx OK. Password required
[12:53:26] PASS (hidden)
[12:53:26] 230-User xxx has group access to: 5000
[12:53:26] 230-This server supports FXP transfers
[12:53:26] 230-You must respect a 6666666:1 (UL/DL) ratio
[12:53:26] 230 OK. Current restricted directory is /
[12:53:26] SYST
[12:53:26] 215 UNIX Type: L8
[12:53:26] Detected Server Type: UNIX
[12:53:26] RTT: 77.644 ms
[12:53:26] FEAT
[12:53:26] 211-Extensions supported:
[12:53:26] EPRT
[12:53:26] IDLE
[12:53:26] MDTM
[12:53:26] SIZE
[12:53:26] REST STREAM
[12:53:26] MLST type*;size*;sizd*;modify*;UNIX.mode*;UNIX.uid*;UNIX.gid*;unique*;
[12:53:26] MLSD
[12:53:26] AUTH TLS
[12:53:26] PBSZ
[12:53:26] PROT
[12:53:26] ESTA
[12:53:26] PASV
[12:53:26] EPSV
[12:53:26] SPSV
[12:53:26] ESTP
[12:53:26] 211 End.
[12:53:26] Detected Server Software: PureFTPd
[12:53:26] PWD
[12:53:26] 257 "/" is your current location
[12:54:05] CWD /TigerBeat1
[12:54:05] 250 OK. Current directory is /TigerBeat1
[12:54:05] PWD
[12:54:05] 257 "/TigerBeat1" is your current location
[12:54:05] MLST Tiger Beat.avi
[12:54:05] 550 Can't check for file existence
[12:54:05] The operation has been added to the Transfer Queue. Check the Transfer Queue for the status.
[12:54:06] MLST Tiger Beat.avi
[12:54:07] 550 Can't check for file existence