Your exe could be named something that matches a known virus in nortons database, or perhaps some part of the programs code looks similar to a virus like pattern. Many AV products these days have heuristic scanning which means instead of looking for an exact match to a given virus (which they still also do) they look for virus like behavior in the code, and can turn up false positives from time to time.

You should be able to find out what virus norton is flagging your app as being, and then do some research on that given virus type to see if you can draw any parallel between them. You may just need to contact symantec directly.