On a webform with an updatepanel I use multiple ModalPopupExtenders. This worked perfectly until I rRecently I installed the new version of the AjaxControlToolkit (version 15).
Since then, when I click a button (not the first time, not the second, but the third time) the background gets selected, the popup looses focus and I can't do anything anymore on my page.
Code and screendumps can be downloaded from www.doppio-l.nl/bestanden/ProblemWithPopUp.zip.
The popups need to be within the panel, because one popup on postback fills the others.
Who can help me?