A simple Custom Behavior does not work even though I've followed steps perfectly

I am hosting a We开发者_运维百科bsite at localhost and the WCF service at localhost/Service, both on IIS 7.5. There's a tiny AJAX code in Default.aspx that calls that WCF service. But, I needed to intercept from client side before it actually reaches the WCF service. I've written a Message Inspector. But it never seems to hit breakpoint at ApplyClientBehavior. I've perfectly followed the steps and researched a lot, and I find no problem with my implementation.

You can download the code from: http://codingproblems.codeplex.com/releases/view/62808#DownloadId=218825

Your help is appreciated.