I have my app all ready to go, but I can't get it working on the server. It's running .NET 4.0, which I thought included AJAX extensions. Anybody have any ideas?
This is the error I get.
Parser Error Message: Unknown server tag 'asp:ScriptManager'.
Line 28: <body>
Line 29: <form id="form1" runat="server">
Line 30: <asp:ScriptManager ID="MainScriptManager" runat="server" EnableHistory="True" />