Service visible after relogin

I've implemented my own db-server which can run as a program as well as
a interactive service.
If the server is minimized it only is visible as a tray icon.
Everything works fine, so long as the user stays logged on.
After log out and re-login the server service is still active, but not
visible.
Does anybody knows a way to make a service visible on such a new desktop?

Thanks

Holger