405 Method not allowed ,Windows Azure WCF Rest Service - asp.net-mvc-4

Question

i have defined a json rest service in Webrole and consumed in another webrole. but whenever i call the the method it throws 405 exception .
[WebGet(ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Wrapped)]
List<String> Registration();
and when i make a get call like
new MmdRef.MMDServiceClient().Registration().ToString();
it throws exception, but if i make a request with fiddler , it happily returns the response .
StackTrace
:
[WebException: The remote server returned an error: (405) Method Not Allowed.]
System.Net.HttpWebRequest.GetResponse() +8527180
System.ServiceModel.Channels.HttpChannelRequest.WaitForReply(TimeSpan timeout) +237
[ProtocolException: The remote server returned an unexpected response: (405) Method Not Allowed.]
System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg) [phone]
System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type) +622
MMDUI.MmdRef.IMMDService.Registration() +0
MMDUI.MmdRef.MMDServiceClient.Registration() in c:\Users\Andrew\Documents\Visual Studio 2012\Projects\MMD\MMDUI\Service References\MmdRef\Reference.cs:101
MMDUI.Controllers.RegisterController.Index() in c:\Users\Andrew\Documents\Visual Studio 2012\Projects\MMD\MMDUI\Controllers\RegisterController.cs:17
lambda_method(Closure , ControllerBase , Object[] ) +113
System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +261
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +39
System.Web.Mvc.Async.<>c__DisplayClass42.<BeginInvokeSynchronousActionMethod>b__41() +34
System.Web.Mvc.Async.<>c__DisplayClass39.<BeginInvokeActionMethodWithFilters>b__33() +124
System.Web.Mvc.Async.<>c__DisplayClass4f.<InvokeActionMethodFilterAsynchronously>b__49() +838059
System.Web.Mvc.Async.<>c__DisplayClass37.<BeginInvokeActionMethodWithFilters>b__36(IAsyncResult asyncResult) +15
System.Web.Mvc.Async.<>c__DisplayClass2a.<BeginInvokeAction>b__20() +33
System.Web.Mvc.Async.<>c__DisplayClass25.<BeginInvokeAction>b__22(IAsyncResult asyncResult) +838644
System.Web.Mvc.<>c__DisplayClass1d.<BeginExecuteCore>b__18(IAsyncResult asyncResult) +28
System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +15
System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +65
System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +15
System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +51
System.Web.Mvc.<>c__DisplayClass8.<BeginProcessRequest>b__3(IAsyncResult asyncResult) +42
System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +15
System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +51
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +606
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +288