Web cache starting problem (Oracle 9iAS)

Hi, newly I installed Oracle9iAS for portal development.
The problem I am having now is:
When I tried to start the web cache service in ias lever,
it always gives me the following error:
oracle.sysman.emSDK.util.jdk.EMException: Throwable: The attempt to start or stop Web Cache failed
Please help em on this issue. Any advice will be greatly appreciated.

I suggest that you post this question in the OracleAS Portal Caching forum:
http://forums.oracle.com/forums/forum.jsp?forum=9

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