Sorry for the delay in answering, Rui.
Go back to a saved game before you get inside the tower and then follow the wt.
It is very important which exit you take after you reach a floor.
Enter and the elevator rises to the
third floor as shown by the number of bars at the center.
At
third floor, look carefully and take the
first left exit. Go out and then go back in. You will automatically go down to the first floor.
At
first floor, look carefully and take the
first right exit. Go out and then go back in. You will automatically go up to the fourth floor.
At
fourth floor, look carefully and take the
second left exit. Go out and then go back in. You will automatically go up to the fifth floor.
At
fifth floor, look carefully and take the
second right exit. Go out and then go back in. You will automatically go up to the top sixth floor.
From here at sixth floor - go out to the terrace and do the telescope puzzle.
Good luck!
