Failover not working in a cluster environment asks Relogin to Application

Hi,
I have setup cluster on weblogic and deployed CRM (ejb/ear) application.
When I stop managed server which is handling request other managed server picks the request but it asks for relogin.
I think failover is not working properly.
Could you please help?
Thanks,
Vishal

Hi Kalyan,
Please See below Diagnostics:
Managed Server1:
===================================================
Date: Tue Sep 04 18:33:12 IST 2012
DdCompnt=11,SessionContext=7,CurrJvmHeapMB=235,Bos=2,JForm=1,MaxBoRowCount=493,JApp=13,JField=1,JDdField=1,JSession=6,Sessions=7,JBaseBo=2,Misc=74,JPTrace=1,LpmErrors=1,Forms=1,Active Sessions=6,JDdTable=1021,MaxJvmHeapMB=467,MaxBos=18,BoRowCount=33,JError=1,JFields=1,UtlRecs=175,FlexAttr=-5,UserContext=3
Managed Server2:
===================================================
Date: Tue Sep 04 18:33:20 IST 2012
DdCompnt=11,SessionContext=8,CurrJvmHeapMB=226,JForm=1,JApp=13,JSession=7,Sessions=8,Misc=148,JPTrace=1,Forms=1,Active Sessions=7,JDdTable=1124,MaxJvmHeapMB=472,UtlRecs=81,FlexAttr=-5,UserContext=4
Free Java Heap Memory: 258400 KB
Total Java Heap Memory: 495779 KB
I tried to open many sessions. Its assigning randomly, but when I kill Managed Server2, its corresponding sessions are not working.
System Error error executing LPoms.getUserContext()
Also I found following warning in Weblogic logs.
<Sep 4, 2012 6:26:15 PM IST> <Warning> <Socket> <BEA-000402> <There are: 5 active sockets, but the maximum number of socket reader threads allowed by the configuration is: 4. The configuration may need altered.>
Thanks for your immediate help.

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