This sounds like a problem to do with the LinkButton not being part of the page control tree at the time when its Post Back Event would be called.

Does it happen outside of the UpdatePanel too?

How exactly are you adding the linkbutton to the page?

I’m looking over 3 hours to figure out why doesn’t LinkButton’s Click event fire when I have it dynamically added into an updatepanel, sounds nothing. even your solution didn’t work, my controls already have IDs associated with.
Have you any other idea how to solve this problem?