I was installing a Visual studio on a new pc I received and adding the AJAX controls via NuGet and it prompted me that there was an update for the AJAX tool, so I was like kewl new toys (AJAX Toolkit 3.5 SP1). Now my pages are freaking out saying that things like asp:Combobox is not a recognized control. I have searched around on how to undo the update and get the controls working again, I uninstalled the 3.5 SP1 controls through NuGet but can't seem to get the server to recognize the controls anymore.
What am I missing in getting these to work again?