Hi,
I tried to search with 3FI_SL_ZS_SI in help.sap.com. It was unable to get anything. Is the datasource technical name is correct? I found some relevant stuff down:--
http://help.sap.com/saphelp_scm700_ehp02/helpdata/en/6c/743e404e093d3ce10000000a155106/frameset.htm