Setting up BI trusted Authentication

Hi All,

I have set up Trusted Authentication in our system using QUERYSTRING method.

Post that, I am able to login to BI Launchpad as well. But, I am unable to run the report.

Shows errors like "Failed to connect to OLAP"

But when I login using SAP Authentication using Launchpad URL, I am able to run all the reports,

Is there any other step which needs to be performed with respect to security post making changes with respect to Trusted Authentication.

BI Version - 4.1 SP P6

Back End- BW 7.4 and Hana Live.

Thanks,

Harsha