SQL 2012 Power View report based PowerPivot Model

Hi,

I've created PowerPivot Model having 2 tables coming from SQL 2012 database. One of this table is a dimension and the other one is a fact having measures.

I exported this workbook having PowerPovit model into Share Point 2010. When I go to create Power View report I am missing the option "Add to table as Sum" for numeric columns (measures). Not sure why is this? When I create a linked table based on data sitting in the worksheet and this option shows for numeric columns in PowerView report.

Anyhelp would be much appreciated.

Thanks

soori