I'm having a little trouble with Limewire (and any other program using the Gnutella network) where I can't upload files, although downloading them is no problem.
I can't figure out what's wrong, help is apreciated.

I'm using a D-Link 604 router and I've tried enabling DMZ so all my ports are open. I'm using port 6346 with "Manual Port Forwarding" enabled in the Limewire options for this same port. I keep seeing something on the forum about a "Force IP checkbox" that should help solve this problem but my version of Limewire does not have this checkbox (4.4.0). Please help me out, eh?