Created Issue: Asp.net 4.5 & Ajaxtoolkit [27252]

Hello everyone, I am using Visual studio 2012.
I created a project with the default template, I immediately added a FilteredTextBoxExtender to filter a textbox but it does not work, someone can tell me why?

I attach the source.

https://dl.dropbox.com/u/52924768/1.rar