I have finished the quest were Brynjolf wanted me to plant the ring on the guy, but that was a long time ago and I don't remember what I did after I planted the ring. But now I want to join the Thieves Guild and I know how to. I talk to Brynjolf and all he says is "Hmm", so I went down to the Ragged Flagon and they tell me to talk to Brynjolf but I cant. I checked my all my quests and none of them have to do with Brynjolf or the Thieves Guild. I really want to join the Thieves Guild but I cant, and everytime I look on google for this bug a similar one appears but it is not the correct one. Please help me because I really want to join.