Unable to login to OD UI 5.5

What

I try to login to OD UI.
The is is present in uid file.
I tried restrting the server.
Tried changing teh password too.

When I checked logs: /webapps/iw-home/AdminServer/servletd/logs/servletout.log

I found the below error:

OpenAPIAuthenticator.authenticate(SimpleIdentity[ username=ab123 domainname=null rolename=od-admin])
java.rmi.UnmarshalException: Return type not Exception
at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:222)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:122)
at com.interwoven.api.access.IWAccessorAuthenticationRemoterImpl_Stub.authenticateUserByPassword(Unknown Source)
at com.interwoven.api.access.IWAccessorAuthentication.authenticateUserByPassword(IWAccessorAuthentication.java:110)
at com.interwoven.sharedutils100.access.OpenAPIUserSession.authenticate(OpenAPIUserSession.java:79)
at com.interwoven.sharedutils100.access.OpenAPIUserSession.(OpenAPIUserSession.java:43)
at com.interwoven.sharedutils100.access.OpenAPIUserSession.(OpenAPIUserSession.java:26)
at com.interwoven.framework.auth.openapi.OpenAPISessionFactory$FrameworkOpenAPISessionAdapter.(OpenAPISessionFactory.java:79)
at com.interwoven.framework.auth.openapi.OpenAPISessionFactory.create(OpenAPISessionFactory.java:35)
at com.interwoven.framework.auth.openapi.OpenAPIAuthenticator.authenticate(OpenAPIAuthenticator.java:211)
at com.interwoven.framework.auth.LoginServlet.doGet(LoginServlet.java:161)
at com.interwoven.framework.base.FrameworkServlet.doPost(FrameworkServlet.java:67)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:405)
at org.apache.tomcat.core.Handler.service(Handler.java:287)
at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:797)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java:743)
at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:213)
at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)
at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:501)
at java.lang.Thread.run(Thread.java:484)
2011-03-17 02:42:38 - Authentication error: user=ab123; domain=null; role=od-admin

RonaldV

I believe in this version there is an authentication service that must be running. Could you check that?