I am running Parallels 5.0 on new MacBook Pro, Snow Leopard, XP and WIN7 virtual machines. I have an AT&T USBConnect Card (Sierra Wireless) Mercury. Firmware is updated as is the AT&T Communications Manager. The card works fine while in Mac OS. As soon as I start one of the VM's, I lose my Internet connection. I can connect to the card, but it goes nowhere. AT&T is telling me that their wireless card devices will not work with Parallels and it is a Parallels problem. I have another Mac that runs XP under Bootcamp, and it works fine there. I would appreciate any suggestions or fixes from someone who is having success with a similar issue.
