demote a dc, break active directory

I configured a 2008r2 server as a new domain controller and that was working well for a few weeks, so I demoted a 2003 server. The 2008r2 server had all of the fsmo roles on it, and the dcpromo didn't have any issues. Now I cannot connect to a remote server via remote desktop. I can map a network share to it but cannot  browse for it. DCDIAG really isn't showing any errors on the 2008r2 machine, as well as repadmin. A third remote server can at least connect to remote desktop, but can't browse for the network either. That has a clean dcdiag and repadmin too. The things I see that in AD sites and sevices, my main server is not there. On the servers folder is a yellow triange with a question mark. I get an error clicking on it that says data from server is not available from domain controller because an operations error has occured. Select another dc form the domain context menu. The other 2 branch servers are there. If I look at it with adsiedit, it all looks correct. Help!