I've set up "Parallels 6 Desktop for Mac" and installed Windows 7 VMs on each Mac machine, and in the network there are a few machines, Mac-server and several Mac-non-servers. The software running on the Windows 7 VMs require an Authorization Key to be installed and plugged into the Server Host machine. The server is fully functional and recognizes the Authorization Key plugged into the USB port, however the other machines on the network (Mac-non-servers) aren't able to identify the key is plugged in. I've concluded that the Mac-non-server's configuration is probably where the issue is since I've confirmed that the Mac-non-server is unable to recognize that the key is plugged into a PC-server on the network as well. Can anyone give me any suggestions on how to troubleshoot why the Mac-non-servers can't find the authorization key plugged into either of the servers? Thanks so much (Additional information: PC-server is running Windows 2000 [eek!] and Mac-VMs are running Windows 7 installations. The authorization key is a USB thumb drive. Come to think of it, I have not yet tested PC-non-servers connecting to the Mac-server.)