Okay. I set up a dedicated server for mw3. Everything worked fine exept that the server is not listed and only LAN visible. I only get this error:"No Steam Master Servers found. Server will LAN visible only."

After two days I started the dedicated server without steam. And it shows the same message but after a few minutes the message "Steam Master Servers found (2). Server will be Internet Server listed." was displayed.

Now is my question:
Is it not possible to start a listed dedicated server while playing the game on the same pc? :O