ScriptManager / AjaxControlToolkit not working

Hi,

Can anybody please tell me if the AjaxControlToolkit is part of 7.1.3? I'm trying to use one of the controls but can't get it working.

The first error I had was 

The control with ID '' requires a ScriptManager on the page. The ScriptManager must appear before any controls that need it.

so I added this to my master page: 

<asp:ScriptManager runat="server" ID="ScriptManager1"></asp:ScriptManager> 

However it doesn't seem to like this as this causes my masterpage file to not be saved and dissappear. I then get this error:

The layout page "AA.cshtml" could not be found at the following path: "~/Views/AA.cshtml".

Any advice on how to get this working would be greatly appreciated!

Thanks


This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/53606-scriptmanager-ajaxcontroltoolkit-not-working