My programs a virus?

When I scan my program on http://virusscan.jotti.org/
I get this Error from NOD32, no other scanner picks up anything:

probably unknown NewHeur_PE (probable variant)

What does it mean, why does it think my programs a virus? What functions could cause that.

Your program has a binary, or part of a binary, very similar to that of a virus. Or part of your program's binary has been infected by a virus already on your computer. I'd advise you to delete the binary, recompile and check again. If the problem persists, ignore it.

What does your application actually do?