Error: Not logged on in interface XAL(function BAPI_SYSTEM_MS_GETLIST)

Hello All,

When I opened BAPI explorer, then Basis Components, then Computing Center Management System, then SystemMonitorSet, then I executed the BAPI GetList for single test by giving EXTERNAL_USER_NAME by which I logged in SAP, then i got the following error:

<b>Error: Not logged on in interface XAL(function BAPI_SYSTEM_MS_GETLIST)</b>

Can anybody tell how to remove this error.

Thanks,

Rajeev Gupta