How to change oracle report server name ?

for example, my report server was rep_appserver, then i want to rename it to rep_test. Here some step to accomplish it, 1.   stop mid-tier $ORACLE_HOME\opmn\bin\opmnctl stopall 2.   stop em website $ORACLE_HOME\bin\emctl stop iasconsole 3.   rename $ORACLE_HOME\reports\conf\rep_<old_report_server_name>.conf to something else or delete it 4.   rename $ORACLE_HOME\reports\server\rep_<old_report_server_name>.dat to something else or delete it 5.   edit $ORACLE_HOME\reports\conf\rwservlet.properties file [...]

REP-56040: Server rep_ already exists in the network.

If this message occured, than you probably have a reports server by the same name running on your subnet. Use a different name for your oracle report server.

Oracle Report Server could not start

I’m not able to start the report server, then i took the following steps in command line, “rwserver -install rep_server_name” But when i start the service i got no error message, the status was Started, but when i refresh it had stopped. I look the smart agent icon disappears when i move the mouse over [...]