I am able to figure out the issue. I have to following change in Multilevel method:
1. Base Value= 12
2. Tick Rem Life
This solve my problem,
Here is the link where I found the resolution:
http://help.sap.com/saphelp_46c/helpdata/en/4f/71de14448011d189f00000e81ddfac/content.htm
Thank you once again for helping me out in this.
Regards,
Vivek