I finished the main quest line of the thieves guild so now I am in the process of returning it to its former glory. I made the alliances with Markarth, Whiterun, and Windhelm plus I did a quest for the fence in the ragged flaggen (cant remember her name). My problem is that I have done countless side jobs in solitude, but Delvin hasn't assigned the "special" quest for solitude yet. Any idea of what I've missed or did wrong?

Is Erikur still alive? He can die up until diplomatic immunity I believe.

If Erikor or whatever his name is, is dead, you can't do it... svcks I know...