router firewall di-604

[lizard4king]

This is my first post. please help, 2 problems may be connected?
I have windows xp home service pack 2
amd athlon 3200+ emachine t3256
high speed connection 3mbs service.
I desconnected my router and had no problem downloading at pretty good speeds but after a while cpu usage would go to a 100% and freze my computer. But i had no firewall, bricks blocking the globe. I reset my router and set it backup, now it shows firewall or bricks Ive gone to portforward did ther set up for my router prety sure i did it write [URL=http://portforward.com/english/routers/port_forwarding/Dlink/DI-604/default.htm]. I need my router to seperate lingo phone and limewire because it takes up to much bandwith.

These are the settings i made to the router.

Advanced

vitual server
help vary apprciated thank you

Name Limewire

Private Ip My computers ip not router

Protocol Type both

Private Port 6346

Public port 6346

schedule always {selected}

limewire, options ,advanced,firewall
Listening Port 6346

Manual Port checked off 6346
And with the router computer still goes 100% cpu usage

and get a repeating once an hour pop up it seems you have no internet conection