You need to open up ports to be able to DCC chat and send. Ports 113, 59, 6060 and the no of ports needed to access your fserve and sends need to be open, say 4000 - 4010 and enter those first and last ports in Tools - Options - DCC - Options enter them in the DCC Ports. Also if u have XP Firewall this will need to be disabled or configured. Shows u how here :-
http://www.ircmadeasy.com/Misc.Troubleshooting.htm
Nice site btw L|B