Hi Surya
Since you are system having SAP ECC6 Support package level 11. I thing SUM will not support on your version. its require minimum SP level should be on 14 onwards its will support, Kindly check the SUM Support guide once and then stating the SUM tool. kindly refer the SUM tool reference pdf file (Required Suser id)
https://websmp206.sap-ag.de/~sapidb/011000358700000783572011E
Regards
Sriram