Object reference not set to an instance of an object.

Email Address : faizal.sulaiman@teras.uemnet.com Steps to follow : I'm following the USer Guide 1. Create new Service and drag Random service for tutorial DIceRoll. at Dev2.Studio.ViewModels.WorkSurface.WorkSurfaceContextViewModel.Debug() at Dev2.Studio.ViewModels.WorkSurface.WorkSurfaceContextViewModel.b__55_0(Object param) at Dev2.Security.AuthorizeCommand`1.Execute(Object parameter) at Dev2.Studio.ViewModels.MainViewModel.Debug() at Warewolf.Studio.ViewModels.ExplorerItemViewModel.b__167_0() at Microsoft.Practices.Prism.Commands.DelegateCommand.<>c__DisplayClass6.<.ctor>b__2(Object o) at Microsoft.Practices.Prism.Commands.DelegateCommandBase.<>c__DisplayClass2.<.ctor>b__0(Object arg) at Microsoft.Practices.Prism.Commands.DelegateCommandBase.d__7.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.Practices.Prism.Commands.DelegateCommandBase.d__4.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.AsyncMethodBuilderCore.b__4(Object state) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs) at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)