VB program running as a Service.

I have a VB program that copies some files from one server to another, also accessing an FTP site.
I have a Form which contains Timer, Inet, Winsock and SMTP controls.
I set it up to run as a Service using SRVANY.EXE .
You can start the service manually OK, but it does not start automatically at the server startup, even though it is set up to start automatically.
Is it because it has a Form?
Or what is the problem?
Thanks.
Alex.