Bumps every 3 hours in the middle of the night aren't the best way to get an answer
Try opening up ports (forwarding) ports 4990 to 5000, as well as the following:
mIRC DCC / IRC DCC.
The IRC port is usually 6667, but is sometimes 7000
OUT TCP 6667
or
OUT TCP 7000
IN TCP 113
mIRC Chat
OUT TCP 100
IN TCP 101
mIRC Fserve
OUT TCP 110
IN TCP 111
mIRC Send
OUT TCP 120
IN TCP 121
mIRC Get
OUT TCP 130
IN TCP 131
OUT TCP 132
~Ladi