Uldaman

So i was doing a few minutes ago Uldaman, and we were at the last boss, Archaedas, whatever his name is, and we were channeling the thing in front of him and nothing. So i went on global, looking for help, most of peps were saying that we need to logout, so we did, and still nothing. Can anyone tell me is it bugged or is there some specific thing that i need to do to summ him. Cuz i tried hundred times and its still rock solid.

It's been bugged for the past months, don't worry about it.

Does anyone knows when will they fix it, i need only this one to complete achievement. Thank you all in advance if someone knows any information. Jah bless you all