New Dell Inspiron notebook running Vista can't connect to a router that is behind a wireless AP. It can ping other PCs connected to the AP, and the AP itself, however nothing behind the AP. An XP notebook connects to the AP and works fine. The Vista box pulls an IP from the router behind the AP just fine. Have tried a static IP with the same result.
When pinging anything behind the AP, Vista reports "Destination Host Unreachable". The Vista box is pingable from PCs hardwired to the router.