Head count in MSS

Dear All,

When i click on MSS->Team I am getting following error

Portal Runtime Error

An exception occurred while processing a request for :

iView : pcd:portal_content/com.sap.pct/line_manager/com.sap.pct.erp.mss.bp_folder/com.sap.pct.erp.mss.roles/com.sap.pct.erp.mss.manager_self_service/com.sap.pct.erp.mss.manager/overview/com.sap.pct.erp.mss.team/com.sap.pct.erp.mss.team/com.sap.pct.erp.mss.headcount_overview

Component Name : com.sap.portal.appintegrator.sap.BWReport

Exception in SAP Application Integrator occured: Application URL 'http:///sap/bw/BEx' is not valid! Please check the protocol and host entries for system 'SAP_BW'..

Exception id: 04:28_09/09/07_0005_3429050

See the details for the exception ID in the log file