|Did the product say it was for Vista and your printer model? Can you change the printer type by the printers menu (just in case)|
Try to change the port used by the printer. It would be lpt2 maybe or such.See system hardware information.
Might also have to change the type of lpt to match what the printer needs. Usually it need bi-directional.
Might have to un-install printer software and re-install
Playing to the angels
Les Paul (1915-2009)