Thanks I use the code did not work. But looking up what you gave allowed me look at the complete ajax post and the problem was the 

<script src="~/Scripts/jquery-1.5.1.min.js" type="text/javascript"></script>

I had to change it to this <script src="@Url.Content("~/Scripts/jquery-1.5.1.min.js")" type="text/javascript"></script>

Not it is firing thanks.