Only Integrated Security is supported for AX queries

I am going to delete the Old Report Folder to deploy new report in AX 2012 R2. While deleting the folder. The error shows below

"An Error occurred within the report server database. This may be due to a connection failure, timeout or low disk condition within the database.

(rsReportServerDatabaseError)

Time out Expired. The timeout period elapsed prior to completion of the operation or the server is not responding

Please help me.