The router is a Belkin Wireless G F5D7230-4.
Im using UPP file serving script with mIRC 6.14 on my spare computer. When anyone uses the trigger, they get:

Acknowledging chat request...
-
Unable to connect
-
DCC session closed

or "waiting for acknowledgement"

mIRC port settings are set 5001-5010
Router port are set the same. I have disabled everything(all firewalls)and enabled the DMZ just to see if I can get it to work and it still won't.
Do u need to know anything else?