I try a lot before giving up, and resorting to posting on an online forum comes very close to a depression for me. I've been having issues with the AJAX controls, and this might surprise you, but I've been hopelessly trying to make the AJAX controls work on a page, but... it's not!
I even went to the point of creating a folder within the AJAX sample website folder, just to make sure I'd have everything right. I really needed it to work, but it let me down.
Here's my code: