Thanks for your answer, but you are missing the point. I am way beyond what you describe. I already went through the maintenance tunnels and the lower tunnels I end up in academy level 2, there I have to:
a) Summon an imp - done
b) Summon different creatures an protect me with the appropriate crystals from the altars -done
c) Summon a Demon (who turns out to be Samuel) - done
d) Identify Hoxplox (the dead imp) as the drug dealer - done
The teacher who tells you to summon the demon, tells you after Samuel is gone, that you now may enter academy level 3. The door leading to the stairs up to level 3 remains locked:
See this
link.
I am talking about the door a the southern end of room 1 which leads to staircase C, which in turn is supposed to lead to academy level 3.
Greetz
Ganzir