Step 1 : Login as Application User
Step 2 : cd $IAS_ORACLE_HOME/j2ee/home/config
Step 3 : cp -rp system-jazn-data.xml system-jazn-data.xml_orig
Step 4 : vi system-jazn-data.xml
Step 5 : edit the following section ::
>> the credentials part with "!" sign followed with the password
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[user][name]oc4jadmin[/name]
[display-name]OC4J Administrator[/display-name]
[description]OC4J Administrator[/description]
[credentials]!password123[/credentials]
[/user]
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Save this file...
and restart your OPMN Services
Refer : Metalink note-id :: 576587.1