with a standard www it works, with an account specific url it does not

Seems like it could be permission problem. You may not have permission to run cgi scripts in your folder or under your account.

I didn't read past the introduction and I doubt that many will. Besides making a shorter post for our sake, trying to run short, simple tests should shine light on the real problem buried in all this code. If you don't mind the advice, this is a good technique in programming and, IMHO, all problem solving.