c# - allowDefinition='MachineToApplication' beyond application level. in mvc 5 -

server error in '/' application.  configuration error  description: error occurred during processing of configuration file required service request. please review specific error details below , modify configuration file appropriately.   parser error message: error use section registered allowdefinition='machinetoapplication' beyond application level.  error can caused virtual directory not being configured application in iis.   line 40:     <machinekey validationkey="c5be943dd83c87adf51cdbf28aad5624bb309cb9257b260222e418aeeda4e9d53f9306fa9bae7ede9a50159cf41d792aeccc71ca58e2cf36b134bac51386e673,isolateapps" line 41:                decryptionkey="24334bd07ef93d06d979abfe3ab773100704c23cf6b96335,isolateapps" line 42:                validation="hmacsha256" decryption="aes" /> show additional configuration errors:   error use section registered allowdefinition='machinetoapplication' beyond application level.  error can caused virtual directory not being configured application in iis. (c:\communicationmodule\emailtemplate.ui\areas\sso\views\web.config line 45) 

here using single sign on using mvc 4.

this site following: single sign on using mvc 4

here code:

 [system.web.mvc.httpget]         [system.web.mvc.allowanonymous]         public actionresult login(string returnurl)         {             if (request.isauthenticated)             {                 return redirecttoaction("index", "home");             }              viewbag.returnurl = returnurl;             return view();         }          [system.web.mvc.allowanonymous]         [system.web.mvc.httppost]         [validateantiforgerytoken]         public actionresult login(string username, string password, string returnurl)         {             if (formsauthentication.authenticate(username, password))             {                 formsauthentication.setauthcookie(username, false);                 if (!string.isnullorempty(returnurl))                 {                     return redirect(returnurl);                 }                 else                 {                     return redirecttoaction("index", "home");                 }             }             else             {                 modelstate.addmodelerror(string.empty, "invalid login details");                 viewbag.returnurl = returnurl;                 return view();             }         } 

here web.config file:

 <machinekey validationkey="c5be943dd83c87adf51cdbf28aad5624bb309cb9257b260222e418aeeda4e9d53f9306fa9bae7ede9a50159cf41d792aeccc71ca58e2cf36b134bac51386e673,isolateapps"                decryptionkey="24334bd07ef93d06d979abfe3ab773100704c23cf6b96335,isolateapps"                validation="hmacsha256" decryption="aes" />    <authentication mode="forms">       <forms name="singlesignon"       loginurl="http://localhost:1849/sso/ssotemplate/login"       timeout="480" slidingexpiration="true">         <credentials passwordformat="sha1">           <user name="demo"           password="89e495e7941cf9e40e6980d14a16bf023ccd4c91"/>           <!--password = demo-->         </credentials>       </forms>     </authentication> 

i generate new machine key in iis also.

how solve problem???