I go into the printer properties and click on the configuration tab and then the installable options button. All the options show, but they are greyed out. I can not enable the optional duplex unit because of this. I can not print double sided because it can not be enabled.
The printer and duplexer work fine on a Server 2003 x86 server. It seems to be a driver issue, but I have no idea how to fix it. This is the latest x64 driver available from Xerox's web site.
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