I can't get anything to happen.

Hint 1 of 5:

All you really need to do is to solve the right puzzles.

Hint 2 of 5:

Have you found Cassima?

Hint 3 of 5:

Did you get in the vizier's room?

Hint 4 of 5:

And open the trunk in his room?

Hint 5 of 5:

Did you get past the enchanted door?