Printing envelopes fails



I am trying to print a #10 envelope from Microsoft Word. I have tried using Custom Postscript page size, and it comes out on an 8x11 page.  The PDFcreator printer is on a Server2008 being shared, so I went into the Print Server settings and ensured that under Forms, Envelope #10 was in there.  However, that form option is not an option I can pick for my PDFCreator printer.

Any suggestions?