Uploads 0Byte Files Onto Server

My SmartFTP client uploads 0 byte files to the server. I don't really understand what is the problem. Here is the log.

[16:09:19] PWD
[16:09:19] 257 "/upload/upload" is your current location
[16:09:19] PASV
[16:09:20] 227 Entering Passive Mode (72,36,223,84,99,156)
[16:09:20] Opening data connection to 72.36.223.84 Port: 25500
[16:09:20] MLSD
[16:09:23] 150 Accepted data connection
[16:09:23] 226-Options: -l
[16:09:23] 226 0 matches total
[16:09:23] 0 bytes transferred. (0 bytes/s) (890 ms)
[16:09:26] MLST ajax.php
[16:09:27] 250-Begin
[16:09:27] type=file;size=0;modify=20080430230904;UNIX.mode=0644;UNIX.uid=0;UNIX.gid=0;uniq
ue=811g11f2312; ajax.php
[16:09:27] 250 End.
[16:09:30] MLST ajax.php
[16:09:30] 250-Begin
[16:09:30] type=file;size=0;modify=20080430230904;UNIX.mode=0644;UNIX.uid=0;UNIX.gid=0;uniq
ue=811g11f2312; ajax.php
[16:09:30] 250 End.
[16:09:32] MLST ajax.php
[16:09:33] 250-Begin
[16:09:33] type=file;size=0;modify=20080430230904;UNIX.mode=0644;UNIX.uid=0;UNIX.gid=0;uniq
ue=811g11f2312; ajax.php
[16:09:33] 250 End.
[16:09:41] MLST announcement.php
[16:09:42] 250-Begin
[16:09:42] type=file;size=0;modify=20080430230922;UNIX.mode=0644;UNIX.uid=0;UNIX.gid=0;uniq
ue=811g11f2313; announcement.php
[16:09:42] 250 End.
[16:09:44] MLST announcement.php
[16:09:45] 250-Begin
[16:09:45] type=file;size=0;modify=20080430230922;UNIX.mode=0644;UNIX.uid=0;UNIX.gid=0;uniq
ue=811g11f2313; announcement.php
[16:09:45] 250 End.
[16:09:46] MLST announcement.php
[16:09:47] 250-Begin
[16:09:47] type=file;size=0;modify=20080430230922;UNIX.mode=0644;UNIX.uid=0;UNIX.gid=0;uniq
ue=811g11f2313; announcement.php
[16:09:47] 250 End.
[16:09:51] MLST attachment.php
[16:09:52] 250-Begin
[16:09:52] type=file;size=0;modify=20080430230932;UNIX.mode=0644;UNIX.uid=0;UNIX.gid=0;uniq
ue=811g11f2314; attachment.php
[16:09:52] 250 End.
[16:09:53] MLST attachment.php
[16:09:53] 250-Begin
[16:09:53] type=file;size=0;modify=20080430230932;UNIX.mode=0644;UNIX.uid=0;UNIX.gid=0;uniq
ue=811g11f2314; attachment.php
[16:09:54] 250 End.
[16:09:54] MLST attachment.php
[16:09:54] 250-Begin
[16:09:54] type=file;size=0;modify=20080430230932;UNIX.mode=0644;UNIX.uid=0;UNIX.gid=0;uniq
ue=811g11f2314; attachment.php
[16:09:54] 250 End.
[16:10:06] MLST calendar.php
[16:10:07] 250-Begin
[16:10:07] type=file;size=0;modify=20080430230947;UNIX.mode=0644;UNIX.uid=0;UNIX.gid=0;uniq
ue=811g11f2315; calendar.php
[16:10:07] 250 End.

Post the log from the transfer queue.