So I have a new Linksys (wired) router..

I can DCC Send and DCC Get perfectly fine.

I can't receive or send DCC Chat's though.

I've got 5 DCC ports in my router forwarded. My machine has the correct ip, and the ports are forwarded to the correct IP in the router. When I tried to CHAT/receive CHATs no other dcc ports were being used.

mIRC lists: 1024-5000
Ports Forwarded: 4095-5000

Any ideas?

try setting the range of mIRC to the exact amount of forwarded ports...