wireless network

[Orionetheus]

As of late my wireless network disconnects automatically in anywhere from half an hour to 3 hours.

I changed my wireless card to a belkin because my old one did not have a functioning antenna and was hard to installl.

So i have a linksys WRT54G router and a belkin F5D7000 pci adapter

any ideas?

running sp2 xp pro

all updates installed
this is the only computer on the network with the problem