Hi Khan
As per the link have you define the profile parameter in your SAP system?
http://help.sap.com/saphelp_nw70ehp2/helpdata/en/c7/69bcbaf36611d3a6510000e835363f/content.htm and also refer the link for SM21 log in Expert Mode http://help.sap.com/saphelp_nw70ehp2/helpdata/en/1f/8311784bc511d189750000e8322d00/frameset.htm
Regards
Sriram