Jdeveloper 11g TP4: Connection refused error for Embedded Oc4j

Hi,
I am getting following error whenever trying to deploy any application in embedded oc4j or whenever try to connect with embedded server on Resource palette.
Error while getting remote MBeanServer for url: ormi://127.0.0.1:23891/default:
Error reading application-client descriptor: Error communicating with server: Connection refused: connect; nested exception is:
     javax.naming.CommunicationException: Connection refused: connect [Root exception is java.net.ConnectException
I am using Jdeveloper 11g TP 4 on windows XP.
I have checked other links too related to above error and have checked following:
Proper host name entry in host file
No spaces in Jdveleoper installed directory name
Proxy setting in Jdeveloper: excluded localhost and ip address
Will be very thankful if anyone can help me to resolve this issue.
Thanks in advance                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   

Don't spend to much time on this. JDev 11g is production and there will be no OC4J 11g!
--olaf                                                                                                                                                                                               

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