Hi Muhammad,
There are so many links in SCN in this regard.
You can have a look in these below.
https://scn.sap.com/thread/737543
http://help.sap.com/saphelp_rc10/helpdata/en/40/a23c39129ffe2ee10000000a114084/content.htm
Hope it helps.
Regards,
Bodhisattwa