Cant access Zereth mortis on my lvl 70

I tried to go to ZM on my lvl 70 mage and had 0 option to do so. I couldnt even jump in the maw. There are no gossip dialogs to skip to it like i did on my other toons. There are no quest to be picked up . I am at a loss on what to do .if anyone knows how to fix this or if a GM could tell me what is going on that would be amazing.