How Windows Phone 8 mobile devices connected to the local Web services ?
"System.Reflection.TargetInvocationException" unhandled exception of type occurs in System.Windows.ni.dll
See Question&Answers more detail:osHow Windows Phone 8 mobile devices connected to the local Web services ?
"System.Reflection.TargetInvocationException" unhandled exception of type occurs in System.Windows.ni.dll
See Question&Answers more detail:osAlthough your question has many room for improvement you could find a solution here Consuming Local Web Applications In short: you need to alter the configuration of IIS in order for Windows Phone 8 to be able to use your web services.