Break point in IIS Website

Firstly make sure, you provided correct database credential .

 

Check you log files if any exception you are getting. Or you can check logs in Event viewer: Right click on computer -> manage -> it opens an window => select application&service logs.

 

Follow below article, he mentioned how to debug an application hosted in IIS:

 

http://www.codeproject.com/Articles/37182/Debug-your-ASP-NET-Application-while-Hosted-on-IIS