When I use the Bezier line tool to outline my pictures, the picture disappears as I outline. It didn't do that before, so it must be something that I clicked. How do I stop PSP from doing that? I'm using the trial version of PSP X2.

Have you accidentally put fill on? I haven't used PSP but in illustrator if you have fill on and you are drawing around something it will cause the image to disaper...so it might be worth checking to see if you are accidentally filling it