Wireless

Searched the net for an answer to this but to no avail, so I thought maybe a kirupian could help, I have a wireless network at home, using a belkin router and belkin usb adapter, whenever I use any processor intensive application, such as 3dmax, games, even photoshop occasionally, the network loses connection, as soon as I close the app, the connection re-establishes itself and all is well, I have 1 gb of ram, and a p4 2.66 processor so should be able to cope. any ideas?