SQL 2008 Cann't Expand Databases after installing SP3 CU6

I installed SP3 and CU6 on SQL2008 server and not I can't expand databases

application is able to connect to DB server and work properly, even I can query sys.databases and see all DBs, but when clicking on databases tree, it just freeze and eventually error out.

any idea what happened and how to fix this ?

Thanks in advance,

-Patrick

Patrick Alexander