error from RDBMSAuthenticator

Hi experts

I am trying to setup RDBMSAuthenticator on my weblogic server 8.1 [not portal].
When I configured RDBMSAuthenticator on my console, then added the jar:
../p13n/lib/p13n_system.jar to my classpath.

When I restarted weblogic, the following errors were generated.  Could you
advise me what the "requires a valid Personalization license" means?
Do I need to have a separate license to use  RDBMSAuthenticator?

Thanks,


<Jul 17, 2007 8:05:05 AM PDT> <Notice> <Security>
<BEA-090082> <Security initializing using security realm xxx.> 
<Jul 17, 2007 8:05:05 AM PDT> <Error> <RDBMSAuthenticator>
<000000> <RDBMSAuthenticator requires a valid Personalization
license> 
<Jul 17, 2007 8:05:05 AM PDT> <Critical> <WebLogicServer>
<BEA-000364> <Server failed during initialization.
Exception:java.lang.NullPointerException
java.lang.NullPointerException
        at javax.security.auth.login.LoginContext.init(LoginContext.java:195)
        at
javax.security.auth.login.LoginContext.<init>(LoginContext.java:404)
        at
weblogic.security.service.PrincipalAuthenticator.authInternal(PrincipalAuthentic
ator.java:360)
        at
weblogic.security.service.PrincipalAuthenticator.authenticate(PrincipalAuthentic
ator.java:308)
        at
weblogic.security.service.PrincipalAuthenticator.authenticate(PrincipalAuthentic
ator.java:316)
        at
weblogic.security.service.SecurityServiceManagerDelegateImpl.doBootAuthorization
(SecurityServiceManagerDelegateImpl.java:788)
        at
weblogic.security.service.SecurityServiceManagerDelegateImpl.initialize(Security
ServiceManagerDelegateImpl.java:888)
        at
weblogic.security.service.SecurityServiceManager.initialize(SecurityServiceManag
er.java:734)
        at weblogic.t3.srvr.T3Srvr.initializeHere(T3Srvr.java:821)
        at weblogic.t3.srvr.T3Srvr.initialize(T3Srvr.java:669)
        at weblogic.t3.srvr.T3Srvr.run(T3Srvr.java:343)
        at weblogic.Server.main(Server.java:32)
> 
<Jul 17, 2007 8:05:05 AM PDT> <Emergency> <WebLogicServer>
<BEA-000342> <Unable to initialize the server:
java.lang.NullPointerException> 
***************************************************************************
The WebLogic Server did not start up properly.
java.lang.NullPointerException
        at javax.security.auth.login.LoginContext.init(LoginContext.java:195)
        at
javax.security.auth.login.LoginContext.<init>(LoginContext.java:404)
        at
weblogic.security.service.PrincipalAuthenticator.authInternal(PrincipalAuthentic
ator.java:360)
        at
weblogic.security.service.PrincipalAuthenticator.authenticate(PrincipalAuthentic
ator.java:308)
        at
weblogic.security.service.PrincipalAuthenticator.authenticate(PrincipalAuthentic
ator.java:316)
        at
weblogic.security.service.SecurityServiceManagerDelegateImpl.doBootAuthorization
(SecurityServiceManagerDelegateImpl.java:788)
        at
weblogic.security.service.SecurityServiceManagerDelegateImpl.initialize(Security
ServiceManagerDelegateImpl.java:888)
        at
weblogic.security.service.SecurityServiceManager.initialize(SecurityServiceManag
er.java:734)
        at weblogic.t3.srvr.T3Srvr.initializeHere(T3Srvr.java:821)
        at weblogic.t3.srvr.T3Srvr.initialize(T3Srvr.java:669)
        at weblogic.t3.srvr.T3Srvr.run(T3Srvr.java:343)
        at weblogic.Server.main(Server.java:32)
Reason: java.lang.NullPointerException