Oracle Database Discussions

I get this error message, when using DBCA to create a database. Please help! Studying on my own for OCA.

Error message : "Enterprise manager configuration failed due to the following error - Listener is not up or database service is not registered with it. Start the listener and register database service and run EM Configuration Assistant again."

I did the following :
(1)Checked listener service properties and found that the path to executable was

driveletter:\app\product\11.1.0\db_2\bin\oracle.exeoca11g

I change the path above to what is listed below:

driveletter:\app\product\11.1.0\db_2\bin\tnslsnr

I updated :HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\OracleOCA11gTNSListener
image file to reflect the change .

I got the above suggestion from a blog. Not sure if it is right or wrong, but it seems logical. However, it did not resolve my issue


(2) I ran the emca script in db_home/bin directory as suggested by the warning message in DBCA wizard. Reboot my PC. Still no luck.


(3) I open DBCA to verify the database(via delete) is created, and yes it is .
I open EM and attempted to log into the tool as Sys/sysdba user. I get username and/or password are invalid error message. URL: https(strike-through)localhost://158/em/console/logon/logon
I can connect to SQl plus as either a sys/sysdba user but into EM.