outoftown: If your card is 802.11a only then it will NOT work. You need a 802.11b, 802.11g aor a 802.11a/b card for it to work.
Also, people might want to try releasing and renewing their IP leases before connecting.
In the run menu or dos window type, ipconfig/release then at the prompt ipconfig/renew (windows 2000. other systems differ in the nomanclature)