Hi Satish
I am really sorry to you and other who helped in this issue, I didn't update the status as I move to new thread, I resolve the issue
the problem was "Tax is not maintained" -http://scn.sap.com/thread/2002259
everything is executing well, but there is bit issue in Invoice that logged the error
I did modify the VOV7 for the Item Category -TAL, Statistical Value = 'X' (No cumulation - Values cannot be used statistically), but confused with field of same screen Billing Relevance = ??????
Or you can move to issue - http://scn.sap.com/thread/3377556, bocz I am closing this thread better to have.
pls guide.
Regards
Muhammad Shoaib