SharePoint Report Server Integration Mode - Error

Hello team,

We have configured SSRS - SharePoint Integration mode and Reports work fine.

While trying to Configure Snapshot Data under "Manage Processing Options" we get an error: 

I tried to Access the Report Server directly http://sharepoint2010report/ReportServer  (the URL under Central Administration > Reporting Services Integration ) and we get the same error.

The Report Server is running on the Index Server.

Any ideas ?

Dimitris Porikos