sp2 and wireless home internet modules

I purchased and configured a Belkin 802.11b wireles router
about a year ago and shared my DSL internet conmnection
amongst two other computers in my home. Things worked well
and all three computers were sharing the same internet
commection.

Thursday last I downloaded windows SP2 and installed it in
my primary desktop which connects to the router. I also
installed SP2 in my toshiba laptop which has a built in
wireless feature.

The following day to my alarm neither computer with SP@
installed could access the internet..

Two other computers with wireless USB connections worked
fine.

I assumed the issue was with SP2.

Checking with Belkin I have been told their 802 .11B
wireless routher model F5D6231-4