Failed Platform Function StartPage & EndPage

I am using WP11 and trying to create my own label form
for cassette labels. I used to have no problems printing
them. But now, when I go to print it out on my HP1100 I
get this Print Server error message that says, "Failed
Platform Function StartPage" and another referring to
EndPage. On my other computer it works fine, however,
with a different printer. I have updated the print
drivers from HP. I have rechecked my label format, but
no matter what I do, I get the same messages.

Any thoughts?