FTP Timeout Issue on Windows 2003 SP1 with Windows Firewall

I am running Titan FTP Server on my Windows 2003 Standard SP1 box. I have a
synchronization service on another server that synchronizes using FTP,
pulling information down from the Windows 2003 Standard Server in question.
Ever since I installed the Windows Firewall, the synchronization service
starts the download without any issues. If the files it downloads are large
(which is the case - about 70mb each), the FTP connection times out. From
reading on the web, I believe it is because the FTP command port is being
shutdown. When I turn off the Windows Firewall, all works fine without any
issues (that would say to me that the problem is the Windows Firewall).

Are there any settings, I can set on Windows Firewall to say don't time this
port out?

Thanks,
Sean