Tag - SSRS

The permissions granted to user ‘Domain\UserName’ are insufficient for performing this operation

I have faced a problem when I tried to open the Reporting Service Web Site for SQL Server 2005 running on Vista Ultimate.As you can see from the title of the post the error was"The permissions granted to user 'Domain\UserName' are insufficient for performing this operation"I have installed SQL Server 2005 Service Pack 2...