CompuServe Messages

Dear Mike: Every now and then, I get a vertical or horizontal line artifact in PS2.2 when I print something out. The lines always look as if they've been drawn with the line tool, and always seem to be associated with a graphic that I've imported and/or created. I thought maybe these lines could be part of the outside border of a graphic edited in Picture Window that got picked up accidentally, but I can't get rid of them. They don't appear on the screen, only on printout. I've tried drawing white boxes around them and bringing them to front, but to no avail. I need to find out what's causing this pronto. Any suggestions? Thanks, Carson T