Wireless networking a Xerox Phaser 8650 printer

I'm hoping someone might be able to point me in the right direction with this problem. I just purchased a Phaser 8650 printer as well as a Xerox wireless network card and have been having problems getting everything to play together nicely. My normal network connection is wired (via ethernet), and I do not want to use a USB cable to connect to the printer (it will be too far away). I am able to connect to the printer wirelessly via airport, using a computer-to-computer network, if the ethernet cable (from computer to wall) is unplugged. However if I plug back in the ethernet cable, the wireless connection is lost and I can no longer print. Is there a way for me to connect to the net using my T1 line, while still connecting to the printer wirelessly?

Thanks for the advice/help...

hobbes