Error executing child request for handler 'System.Web.Mvc.HttpHandlerUtil+ServerExecuteHttpHandlerAsyncWrapper'

hi
I write payment plugin and when using in LocalHost its work fine .but when put on host my plugin doesn't Redirect From My site to third-party payment gateway and show pop up this error :
'Error executing child request for handler 'System.Web.MVC.HttpHandlerUtil+ServerExecuteHttpHandlerAsyncWrapper'