a problem of execution, and deployment reports (rsAccessDenied)

Hello , I’m on microsoft dynamics ax 2012 R3, I have a problem in reporting, when I try to open a report, an error message appear, permissions granted to user ‘domain \ user’ are insufficient for do this (rsAccessDenied).

So when I deploy a report an info log showing a error message: the deployment was abandoned. You do not have the privileges to deploy to the server: srvnav. For deployment, you must have administrative rights on the SQL Server Reporting Services (SSRS). Contact your administrator to proceed with deployment.

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Thank u for helping me ,

Best regards .