by N4C3R » Tue Nov 02, 2010 4:16 pm
Since this part is really complicated, there can be many reasons why you can´t proceed. But if you really found all the switches, there is one room with two switches next to each other. One of them has to be turned OFF, to proceed to the north, the other has to be ON. I don´t remember which of them is the right one. I hope this will help you.