The request failed with HTTP status 401: Unauthorized." - SQL Reporting Services

The request failed with HTTP status 401: Unauthorized." - SQL Reporting Services

SOLUTION OF THE PROBLEM

In Report Server Machine, I went to ISS where Reports and ReportServer folders are created and for both reports I selected Access for anonyomous user option in Directory Security tab(Right click on that folder and click on the properties) and gave an username and password which i use to login into that Machine and i unchecked the option Windows integrated Authentication in that same tab.