Unable to Upload

I am in the process of evaluating SmartFTP.
I am able to use SmartFTP for downloading and browsing, but I am unable to upload.
I am connecting to servers running HPUX 10.20.
I am going through a firewall running Windows 2003 Server and ISA 2004.
I have changed the IP Address, host name, Firewall IP and user name in the log for security purposes

Here is the log:
[12:15:34] SmartFTP v2.0.997.4
[12:15:34] Resolving host name "IP Address"
[12:15:34] Connecting to IP Address Port: 21
[12:15:34] Connected to IP Address.
[12:15:34] 220 hostname FTP server (Version 1.7.212.5 Wed May 30 12:19:42 GMT 2001) ready.
[12:15:34] USER username
[12:15:34] 331 Password required for username.
[12:15:34] PASS (hidden)
[12:15:34] 230 User username logged in.
[12:15:34] SYST
[12:15:34] 215 UNIX Type: L8
[12:15:34] Detected Server Type: UNIX
[12:15:34] FEAT
[12:15:34] 500 'FEAT': command not understood.
[12:15:34] TYPE I
[12:15:34] 200 Type set to I.
[12:15:34] REST 0
[12:15:34] 350 Restarting at 0. Send STORE or RETRIEVE to initiate transfer.
[12:15:34] PWD
[12:15:34] 257 "/" is current directory.
[12:15:34] TYPE A
[12:15:34] 200 Type set to A.
[12:15:34] PORT Firewall IP,4,97
[12:15:34] 200 PORT command successful.
[12:15:34] LIST -aL
[12:15:34] 150 Opening ASCII mode data connection for /usr/bin/ls.
[12:15:34] 226 Transfer complete.
[12:15:34] 2170 bytes transferred. (13.1 KB/s) (161 ms)
[12:15:54] CWD /home
[12:15:54] 250 CWD command successful.
[12:15:54] PWD
[12:15:54] 257 "/home" is current directory.
[12:15:54] PORT Firewall IP,4,99
[12:15:54] 200 PORT command successful.
[12:15:54] LIST -aL
[12:15:54] 150 Opening ASCII mode data connection for /usr/bin/ls.
[12:15:54] 787 bytes transferred. (76.8 KB/s) (10 ms)
[12:15:54] 226 Transfer complete.
[12:15:56] CWD /home/util
[12:15:56] 250 CWD command successful.
[12:15:56] PWD
[12:15:56] 257 "/home/util" is current directory.
[12:15:56] PORT Firewall IP,4,100
[12:15:56] 200 PORT command successful.
[12:15:56] LIST -aL
[12:15:56] 150 Opening ASCII mode data connection for /usr/bin/ls.
[12:15:56] 226 Transfer complete.
[12:15:58] 2369 bytes transferred. (1.06 KB/s) (00:00:02)
[12:16:04] Remote file exist check: "ReduceLogs.sh".
[12:16:04] TYPE I
[12:16:04] 200 Type set to I.
[12:16:04] SIZE ReduceLogs.sh
[12:16:04] 550 Access is denied.
[12:16:04] File size check (SIZE) failed. File not found or permission denied.
[12:16:04] PORT Firewall IP,4,109
[12:16:04] 200 PORT command successful.
[12:16:04] STOR ReduceLogs.sh
[12:16:04] 550 Access is denied.
[12:16:04] MDTM 20060915144304 ReduceLogs.sh
[12:16:04] 550 Access is denied.
[12:16:04] Transfer failed.
[12:16:04] TYPE A
[12:16:04] 200 Type set to A.
[12:16:04] PORT Firewall IP,4,110
[12:16:04] 200 PORT command successful.
[12:16:04] LIST -aL
[12:16:04] 150 Opening ASCII mode data connection for /usr/bin/ls.
[12:16:04] 226 Transfer complete.
[12:16:06] 2369 bytes transferred. (1.14 KB/s) (00:00:02)

Any assistance will be greatly appreciated.

Hi, acording log you can't upload files there.

[12:16:04] STOR ReduceLogs.sh
[12:16:04] 550 Access is denied.