Each SSRS report in EP Page is showing error ?

Each report was working fine for a long period but last night all of sudden in PROD Server i got this error while acessing any SSRS report through EP Page .The error is "Client found response content type of ‘text/html; charset=utf-8’, but expected ‘text/xml’.But all the reports are working fine when i access through Report Manager URL.Only the problem is with in EP Page.

poor guy…u want get the solution in this site for ages.