SSRS 2008 - Reporting Services Webpage is Blank except for headers

Question

I'm getting blank page when I open the Report Manager: I've got a header - "...Reporting... HOME", and then just empty space.

I'm on SQL 2008 and Windows Server 2008 R2 Standard.

Any ideas how to fix? I've confirmed that I am logged in as a local administrator. I tried adding the URL to trusted sites but that didn't seem to help either.

Update

When I go to the ReportServer URL I get this error message:

Reporting Services Error
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The permissions granted to user 'DTNT\greg' are insufficient for performing this operation. (rsAccessDenied) Get Online Help 

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SQL Server Reporting Services 

Answer 1

Solved it, sort of! I tried right clicking IE and selecting run as administrator, and then going to the report manager URL and everything worked properly.

I clicked on site settings on the top right of the page and added the greg user as a system administrator and system user.

I also added the greg user as a content manager on the root directory.

IT still says I was already a local administrator on that machine, but this seemed to be required to make it work.

Any thoughts why that was necessary?