3 Months <!-- s:shock: --><img src="{SMILIES_PATH}/icon_eek.gif" alt=":shock:" title="Shocked" /><!-- s:shock: -->
Well, it's kind of difficult to help you without linking to a walkthrough or something unless you tell us where in particular you're stuck. Like, how many stairs have you risen? How many of the doors have been opened up? 4? 6? Like the above poster says, there are switches on each level that "solve 1/6th of the puzzle" and two sixths are solved in each level. The switches up the stairs in the main hub level must be pulled, too.
Try looking for a walkthrough online to get you through it, I'm sure there's plenty out there.
[color=red:2sc1qazo]EDIT:[/color:2sc1qazo] What? No more avatar subtext capabilities? Nooooo! My stalker dancing joke is gone! <!-- s:cry: --><img src="{SMILIES_PATH}/icon_cry.gif" alt=":cry:" title="Crying or Very sad" /><!-- s:cry: -->