I have created a new character (I have 2 others lvls 40&50) but there are no quests after I defeat the skeleton king anymore - No 'Blue light' on the skeleton kings throne and no-one to talk to.

I have tried leaving the game but I cannot resume (which I can on my other characters) I can only start again; I have tried this twice to no avail.

Has something changed and how can I now get past the skeleton king with my new character?