Lines printing on Crystal Reports

I want to add a signature to the ChkPnt.rpt. I created the signature
in several different formats: BMP, JPG and GIFF. When I add the
signature to the report and print it via Crystal, it looks perfect.
As soon as I print it from Vantage, a line prints along the bottom of
the BMP/JPG/GIFF. I have added the signature to other reports as
well, like the EmployeeBadge.rpt, and I get the same behavior. Prints
fine in Crystal, but inserts a line under the signature when printed
via Vantage. Has anyone else experienced this? If so, how did you
get rid of it?

Thanks in advance for your help,
Kelly Potratz