After Effects Vanishing Point Error

I am running Windows Vista Home Premium on an HP Pavillion with 4 gigs of RAM and an Intel Core 2 Duo processor, 2.13 GigaHertz per core. When I try to import a .VPE (Vanishing Point) file I did in Photoshop, After Effects, gives me this error:

"Unable to execute script at line 280. Uncaught Java expression:
SyntaxError: XML error in line 46.
- Not well-formed (invalid token)"

What does this mean and how can I fix it?