Permissions problems in SQL Server Reporting Services

If you are having permissions problems in SQL Server Reporting Services, even though your account a member of the Administrators group, try to add it to the users group (users or domain users). After trying dozens of tips, redo multiple configurations, I created another administrative account and this worked without a problem of permission. The difference between this second account and the first was his participation of the user group. Ai was only doing the obvious and include the account that didn't work in the group. Worked without problems. Except that the permissions were based on lower profile, what are the permissions of a user policy. The second administrative account, created for the test, everything was released. All the other tips I used can be found on the Internet.