FTP Problem with D-Link WiFi Mac Set-up

I hope one of you have encountered this and can help me:

I have a new iMac with a D-Link Wi-Fi router.
All types of data comes and goes perfectly.
Except FTP - if I use FireFTP in Firefox or Transmit - I can log into my web FTP but when I try to download something it starts but then it says STALLED and nothing moves - nothing comes down or goes up.

I'm sure its some kind of firewall or proxy setting I need to allow but can't find what I'm supposed to fix - If you have any tips please share with me!

Thanks

 

Hi - yes I solved it but in a workaround rather than a perfect solution.

Basically i had both the broadband line and my iMac ethernet plugged into the wireless router - so I just unplugged the ethernet and plugged that back directly into the boradband router - that cleared up the error right away - so that means it must have been some firewall setting in D-Link that I missed and dont know how to fix.

If I need to sync something wirelessly I just unplug/replug - not the perfect way but it worked and I'm back into my FTP and wifi still works for my other peripherals.