Just bought the PalmPre. Connects to Vista laptop just fine, won't give internet access to XP desktop. Have tried turning off Firewall, have tried Open network on Pre. Get connected just fine, but no internet access. This is why we bought it!!! Several posts on web of same issue with no solution that works. HELP!
Your PC may have WEP. You might need the newer WPA2.
Try this update:
Update for Windows XP (KB893357)
This update to Windows XP provides support for Wi-Fi Protected Access 2 (WPA2), which is the latest standards-based wireless security solution derived from the IEEE 802.11i standard.