Taipan,
If you add your server as a favorite it will only temporarily show up, until it actually does a steam handshake (to show up permanently). It'll get old adding your server as a favorite every time you launch the server
For some reason, some servers won't do the handshake on their own. This is how I got ours to work:
http://forum.1cpublishing.eu/showthread.php?t=26435