Windows XP & Printing in AutoCad

I have a user running Windows XP SP1 and Autocad 2005LT. When he prints to the HP 5000 printer and selects the 11 x 17 paper size it prints to the 8.5 x 11 and screws up the document. It even makes the circles oval shaped.
I have tried updating the drivers on both the workstation and the server. Any other ideas?