If the sample spec did not work for you as well, and reinstalling did not help, the only thing left I can suggest is to make sure that your Windows printer driver is set correctly. As drivers are very different, I won't be able to tell you what changes to make, but if you leave it as 8.5" x 11", it can still print checks on a 7" form.

Should this not work, I would suggest getting your dealer involved, and we'll have to take a closer look.