Transforming Windows into a server

Hi,

I've heard that there was just a registry key to change in order to change a Windows 2000 into a Windows 2000 server but I don't know it, could anyone help me ?

I'm asking this since my windows 2000 doesn't accept more than 10 connections at a time and it's not really convenient.

Thanks. I hope I'm not breaking any rule by posting this thread, else sorry

Regards,