I have downloaded the Ajax control toolkit; I have created a new tab in VS 2008 (SP1) toolbox, added the controls from the AjaxControlToolkit.dll,everything went fine. When I removed the toolbox and tried to perform the same steps as above, it didn't work anymore...
That is, in the window shown for the "Choose items", the controls are't anutomatically added to the list, as before. What should I do?