Only Able To Access Report Manager As Administrator

Hi,

I have Reporting Services set up with the permissions (via Right Click Server/Permisions in SSMS or System Role Assignments in Report Manager) set as follows:

BUILTINAdministrators - System Administrator

When logged in as an administrator I am able to access Report Manager, no problem.

However, I want to add a new group so that non-administrators can access Report Manager. However, whatever new item I add in the permissions appears to have no effect. For instance, if I add a permission for Users, i.e. :

BUILTINAdministrators - System Administrator
BUILTINUsers - System Administrator


I can still only access Report Manager as an administrator.. Any other user just gets the blank page.

I have tried creating a custom group, Report Users, with the same result.

I checked IIS to ensure anonymous access was turned off (this was an issue I had earlier on in my setup - it was turned on, but is now firmly off).

I don't know much about IIS, but I guess the problem is there somewhere. Does anybody have any idea what the problem could be and how I get around it?

Thanks very much in advance

Andy