Ok, first of all the teacher takes the rune and not the circle.
Drop these 4 items on the ground in the corridor, near the lab. Pick them up one by one by click and then go into the fore room. Do you see XP coming up? If so, go to the teacher and speak to him first.
BF probs => I guess, you don't have the patch 1.44 or 1.45, hm? IIRC 1.42(?) and definitely 1.43 had this bug.
And welcome to the forum <img src="/ubbthreads/images/graemlins/wave.gif" alt="" />
