Has ANYONE had the following problem: Original titanium PowerBook G4, fully up-to-date AirPort software and Mac OS X 10.4.8, which will not communicate with a new AirPort Express wireless router in WPA Personal (neither WPA nor WPA2), but which WILL communicate quite happily with any wireless router, anywhere, including aforementioned nice new AirPort, in WEP? Access control is NOT active. Thanks.