Hi Subbu
From the default trace :
1.#F61CD3DCF502007800000150016F00580004F08E38B73783#1390393534396#com.sap.engine.services.rfcengine##com.sap.engine.services.rfcengine.handleRequest#J2EE_GUEST#0##n/a##ecf8e279835b11e3be16f61cd3dcf502#SAPEngine_Application_Thread[impl:3]_16##0#0#Error##Plain###com.sap.engine.services.security.exceptions.BaseLoginException: Authentication failed.#
#1.#F61CD3DCF502007800000151016F00580004F08E38B737AB#1390393534396#com.sap.engine.services.rfcengine##com.sap.engine.services.rfcengine.handleRequest#J2EE_GUEST#0##n/a##ecf8e279835b11e3be16f61cd3dcf502#SAPEngine_Application_Thread[impl:3]_16##0#0#Error##Plain###com.sap.engine.services.security.exceptions.BaseLoginException: Authentication failed.
Please check the user ID maintained in the user credentials section on VA and ensure that it is unlocked in the SAP BW ABAP side.
Also check if the credentials for the user are fine.
Thanks
Rishi