In Oracle 11g when we are opening OEM in browser it is showing the following message :

"Enterprise Manager is not able to connect the database instance." Listener status is showing Up and Agent Connection to instance the status is showing unavailable.

please provide a solution.

I am attaching a screenshot of my problem. I still did not find any solution yet.plz help enter image description here

2 Answers 2


You may need to resecure the agent. Here is a link that should help.


  • Thanks for the reply, but whatever you have provided are related to Unix, my environment is windows 7. can u please share some link related to windows 7 platform.
    – Tony
    Dec 15, 2014 at 14:14
  • The steps are the same you would just do them from the command prompt rather than a shell prompt. You should make sure that the dbsnmp account is known and not locked in the target database.
    – Gandolf989
    Dec 15, 2014 at 15:32
  • sysman account is locked again and again.
    – Tony
    Dec 16, 2014 at 14:13

You may need to reset the "dbsnmp" user's password from the database. Then update the password of dbsnmp user in OEM:

Targets --> Select database and press "Configure".


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