Debugging each file?

Hello I have a Web form here http://http://www.dimadayoub.net/contact which is not sending. There is nothing wrong with the SMTP code (3 different people have tried it on their own servers and it works), and my own Web hosting service assures me that I am using the correct SMTP credentials. I can only assume that the problem resides deep in my code - there are only 4 Web pages on the site but they are supported by over 100 behind-the-scenes files. I will probably have to debug every file. In order to do that, do I just click on each individual file in the App_Code, bin, and Scripts folders (plus the rest) in Solution Explorer in order to load them up in Visual Studio (Express for Web 2013) and then click on 'Debug'? Thank you.