We have CM 5.1. I installed CRS 5.0 on a MCS 7835 server(win 2003+SP2). At initial setup phase; after i installed the license i took approximately one hour to activate the components. When it finished; there was a problem with unified CM telephony client. When i open <server>/appadmin, an error popup says; there is inconsistency about unified cm client and recommends to resynchronize. When i try to resynchronize (Unified CM Telephony menu), it takes approximately half an hour to finish and at last it cannot synchronize. It says " an error occured".
Network connection between CM and UCCX is very good. They are one the same switch and on same subnet. Pings are normal.