This question is not specific on what types of issues you are hitting when trying to run this application. But one thing to check is that you have been given the rights to make outbound calls. Unless things have changed, you have to request this functionality from Tropo support.
A good C# framework that runs on MVC 4 for developing Tropo applications is VoiceModel. It is open source under the Apache license and simplifies voice application development. You develop your application once and it will run on Tropo and any VoiceXML compatible system. Here is an article on using VoiceModel to create outbound applications.