Error 426 - Need help!

I keep getting error 426 (Connection Closed, xfer aborted) when uploading to my colocated server with SmartFTP.

I could use some help in troubleshooting this as I think it is my local firewall (LinkSys Router) that may be the culprit.

Here's a log from SmartFTP:

220 dtnmain Microsoft FTP Service (Version 5.0).
USER wayneweb
331 Password required for wayneweb.
PASS (hidden)
230 User wayneweb logged in.
SYST
215 Windows_NT version 5.0
FEAT
500 'FEAT': command not understood
REST 100
350 Restarting at 100.
REST 0
350 Restarting at 0.
PWD
257 "/wayneweb" is current directory.
Cached directory reloaded.
Cached directory reloaded.
CWD /wayneweb/web
250 CWD command successful.
PWD
257 "/wayneweb/web" is current directory.
Cached directory reloaded.
TYPE I
200 Type set to I.
PORT 192,168,0,10,5,95
200 PORT command successful.
Opening data connection IP: 192.168.0.10 PORT: 1375.
STOR Serenity.mp3
150 Opening BINARY mode data connection for Serenity.mp3.
An existing connection was forcibly closed by the remote host.
426 Connection closed; transfer aborted.
TYPE A
200 Type set to A.
PORT 192,168,0,10,5,96
200 PORT command successful.
Opening data connection IP: 192.168.0.10 PORT: 1376.
LIST -aL
150 Opening ASCII mode data connection for /bin/ls.
595 bytes received successfully. (595 B/s) (00:00:01).
226 Transfer complete.



I have done the following things:

Active mode fails too (the log you see is active mode, not passive)
I can download, change and create dirs so it shouldn't be permissions.
If I upload locally on the server it works, so the FTP server is working.
If I disable the software firewall running on the server I still have the issue.


I'm clueless what to do now - :cry: :cry:

Thanks!

InetMaster