Changing authentication to SSO in BO CMC

Hi,

     On changing OLAP connection authentication from pre-defined user to SSO in BO CMC(SSO is already configured between BW and BO) ;on creating a new webi report using the OLAP connection I am getting the following error message:-

java.util.concurrent.ExecutionException: com.businessobjects.sdk.core.server.CommunicationException$UnexpectedServerException: [[error.openSapBwBrowsingSessionFailed] 0] <<?xml version="1.0" encoding="UTF-8" standalone="yes"?><ConnectionString>

   <Properties>

      <Initial Catalog />

      <Language>en_US</Language>

      <Data Source>ip address</Data Source>

      <Cube Type>Unknown</Cube Type>

      <SaveLanguage>true</SaveLanguage>

      <Initial Cube />

      <TargetProvider>SAPNETWEAVER7X</TargetProvider>

      <NetworkLayer>SAPBW_BICS</NetworkLayer>

      <Authentication Mode>2</Authentication Mode>

   </Properties>

   <ExtendedProperties>

      <JCO_ASHOST>ip address</JCO_ASHOST>

      <SapLoginMode>0</SapLoginMode>

      <JCO_R3NAME>system id</JCO_R3NAME>

      <JCO_CLIENT>client</JCO_CLIENT>

      <JCO_SYSNR>00</JCO_SYSNR>

      <JCO_LANG>EN</JCO_LANG>

   </ExtendedProperties>

</ConnectionString>>

Caused by: com.businessobjects.sdk.core.server.CommunicationException$UnexpectedServerException: [[error.openSapBwBrowsingSessionFailed] 0] <<?xml version="1.0" encoding="UTF-8" standalone="yes"?><ConnectionString>

   <Properties>

      <Initial Catalog />

      <Language>en_US</Language>

      <Data Source>ip address</Data Source>

      <Cube Type>Unknown</Cube Type>

      <SaveLanguage>true</SaveLanguage>

      <Initial Cube />

      <TargetProvider>SAPNETWEAVER7X</TargetProvider>

      <NetworkLayer>SAPBW_BICS</NetworkLayer>

      <Authentication Mode>2</Authentication Mode>

  Caused by: com.businessobjects.sdk.core.server.ServerException: [[error.openSapBwBrowsingSessionFailed] 0] <<?xml version="1.0" encoding="UTF-8" standalone="yes"?><ConnectionString>

  </ExtendedProperties>

</ConnectionString>>

at com.sap.sl.sdk.requests.doit.DoItRequestHandler.afterProcessing(DoItRequestHandler.java:50)

Any ideas or suggestions would be highly appreciated.

Thanks & Regards,

Anuradha Padhee