I am having a Xerox Phaser 3310 PS printer, with Duplex unit installed. The printer is associated to our SBS 2008 SP1 server, and is mutual on the intra network. On the website of the printer manufacturer a Postscript PPD file is established. They portray the printer as compatible with Windows 7 64 bit. The printer is installed involuntarily, and the Duplex option is perceptible. Even when this options is selected, every print is Single sided. I looked at the support articles in MS forums and Xerox forums, but didn’t find a solution. So I am having much expectations from your side. Any other information related to this topic would be grateful.