LSOCP 604 , cannot play web based training

Hi all,

I am not able to play web based training on the learning portal.

i get an error saying

Errors occurred

   Logon to the learning system failed.

Please contact your system administrator.

http://......:50000/lms/mediator/config

Username='.....', SystemName='....', Client='100', Host='.....', Language='EN', SystemNumber='00', EnablePoolSharing='false', MaxConnection=50, AbapDebug=false:

CPCFG.RSURL = http://......:50000/irj/go/km/navigation/documents/LSODOcs?StartUri=/

CPCFG.REPUS = sub_cadmin

ServerURL=http://......:50000/irj/go/km/navigation/documents/LSODOcs?StartUri=/ ok!

Error in

http://........:50000/lms/checkconfig

could not retrieve a Backend Config for null_null

com.sap.hcm.ls.shared.config.backend.BackendConfigException: illegal system name: null

at com.sap.hcm.ls.lms.config.backend.j2eeprovider.J2EEConfigProvider.getBackendConfig(J2EEConfigProvider.java:76)

at com.sap.hcm.ls.lms.servlets.control.CheckConfig.doGet(CheckConfig.java:73)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:401)

at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:266)

at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:386)

at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:364)

at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:1039)

at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:265)

at com.sap.engine.services.httpserver.server.Client.handle(Client.java:95)

at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:175)

at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33)

at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41)

at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)

at java.security.AccessController.doPrivileged(AccessController.java:219)

at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:104)

at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:176)

Please help me proceed ...

Thanks ,

Pavan