Just installed one of the original airport cards in this machine, and though all indications are that it is working correctly, it doesn't see the USR wireless router sitting 10 feet from it. No networks show up in the dropdown list, and manually adding does nothing. Encryption is a simple MAC filter (this card has already been added), and SSID is broadcast. Did I get a bad card? System profiler seems to think it's fine. It's an original airport card. Computer's a G3 400 Mhz iMac. A G3 300 Mhz iBook with original airport card is having no troubles. Firmware of Airport card is 9.52 Firware of router is up to date. OSX 10.3.9 Thanks in advance! All help greatly appreciated; this is my moms little computer, and we're trying to rearrange and loose some wires.