Em configuration error

Hi

Oracle Database 10.2.0.4, win 2008 standard.

I recently moved my database from one server to another with a diff hostname.
Database started successfully.
However when i open EM console, it shows the hostname of the previous server.

I searched for a solution and found a command
emca -config dbcontrol db -repos recreate
it executed successfully and showed the correct domain.
But EM still gives the same error.
java.lang.Exception: UnknownHostException sending request :: (my-old-hostname)

I only copied the oradata folder and password file and spfileorcl.ora from one server to the other.
listener.ora and tnsnames.ora shows the right hostname.