WCF Database Service Never Responds

[RonaldFlint]

I am trying to build an app in ArcGIS Silverlight builder. I have a WCF service that I deployed to IIS on the remote server. Within Visual Studio I can add a service reference by typing in the URL of the service on the server. However, when I build the Add-Ins, upload them, and run the tools within the app, I never get any response from the WCF service.

What might I be doing wrong?

[RonaldFlint]

Just to clarify: It doesn't appear that there is a problem with the WCF service itself. I used the Microsoft tool to test the service on the server and it works as expected.

The problem is with the Add-Ins I created to work with the ArcGIS builder. They work when I debug from my local machine, but on the server they do not.