Forum:Curtis Won't Go Into The Tower

Hi, can someone please help. I'm doing I Put A Spell On You but Curtis won't go into the tower, he just stands outside the door. I can't reload a previous save as I've done loads since I got this quest. I've pickpocketed the codes from him but still can't do anything. I don't need this to complete the Bitter Springs quest as Hsu has sent troops but it's really annoying - one of the many bugs.