I'm getting this error message while deploying a jar on Weblogic 6.1

======= error start ===========
Persistence type 'TOPLink_CMP' with version '3.6 which is referenced in bean
'Account' is not installed. The installed persistenc
e types are: (WebLogic_CMP_RDBMS, 6.0), (WebLogic_CMP_RDBMS, 5.1.0), (TOPLink_CMP,
3.0), (TOPLink_CMP, 3.5).
        at weblogic.ejb20.deployer.MBeanDeploymentInfoImpl.getPersistenceType(MBeanDeploymentInfoImpl.java:615)

======= error end ===========

Environment :

OS : Windows 2000 Advanced Server
Weblogic server version 6.1
TopLink version 3.6

I have made the necessary changes as :
- Changing persistence.install file to include entry of "TopLink_CMP_Descriptor.xml"
- Included "TopLink_CMP_Descriptor.xml" in classpath

Am I missing anything?

Thanks in advance