Deploying a report on Sharepoint keep asking me login

Always Asking login when deploying a report to SharePoint.

I have tried all the steps reported on previous post :

https://social.msdn.microsoft.com/Forums/office/en-US/2f977ea8-5fe5-42f4-8d25-126435295943/cannot-deploy-a-report-to-sharepoint-report-library-via-bids?forum=sqlreportingservices

to no avail.

I still have the windows login box.

The user I enter has all the right for the Reports bd, master, etc...  and all the right to the web site sherepoint

Im using SharePoint 2013 with SQL Server 2014

Any Idea what could be wrong ?