PowerView - Can't install reporting services add-in for sharepoint

hey,

i'm trying to install PowerView on our existing sharepoint server.

i'm following the steps in the deployment document-->

http://msdn.microsoft.com/en-us/library/hh231687%28v=sql.110%29.aspx

i'm stuck now with the installtion of the " Reporting Services Add-in" nothing seenms to work, i've tried to follow the steps in this document -->

http://msdn.microsoft.com/en-us/library/aa905871%28SQL.110%29.aspx

and the error that i'm facing is -->

SSRSCustomActionError: Could not load file or assembly 'Microsoft.ReportingServices.SharePoint.Common, Version=10.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91' or one of its dependencies. The system cannot find the file specified.

i've checked in windows\assembly folder and the Microsoft.ReportingServices.SharePoint.Common version is 11.0.0.0

so, i have a newer version then i need?

what can i do?

Dave