Actually, by version I meant if you are using DB Console of OEM or the OEM Java Console. I'll assume you are talking about the DB Console? Given that, when you created the new database with DBCA it probably didn't assign a new port for the new database. If not, you should set the ORACLE_SID and the run:

Code:
emca -reconfig ports -DBCONTROL_HTTP_PORT <new_port#>