I've been able to get SCCM 2012 to work with version 11.2.1. On the server host spot, i've put in the ip address it added port 1433 on its own. On database name, I just used the SCCM database. You have to use a sql user account as a network account won't work. Make sure you've also checked sql and microsoft authentication on the sql server instance. Kept running into authentication issues before I changed to a sql account.