How can I display a free floating panel for an input form using PopupControlExtender?

I am currently playing with PopupControlExtender in ajaxToolkit and cannot get the functionality I need.

I am trying to display a free floating support bar for an input form.

As soon as the user clicks the help button on the form, the panel appears and displays without issue, however, as soon as I click on the main form, it disappears again.

I understand this is a good behavior for most applications, but I would like the popup to stay on screen until it is explicitly closed (via the close button inside the panel itself).

Is this possible, and if so, how?