Currently Being ModeratedDec 8, 2012 10:18 PM (in response to Townsends1316)
Welcome to the Apple Support Communities
Apple sells Mountain Lion Server in the App Store and you're using Lion Server. You have two ways to upgrade to Server:
1. Call Apple to purchase Lion Server > http://support.apple.com/kb/HE57
2. Make a backup, purchase Mountain Lion in the App Store and, after upgrading to Mountain Lion, purchase Mountain Lion Server.
I recommend the second one in order to get the latest version