Amnesia: The Great Work - FULL RELEASE

[Clord]

Very good cs until now, but im stuck in chapter 3:

SPOILER:
I exploded the wall in the laboratory and then went down by hanging myself in the chain, then I went to the clock work and saw stairs, so went even mre down but the stairs are broken down there and I cant reach the door next to the broken stairs! On the W.side theres nothing useful ,just one door that has a padlock and i tried using every item on it and it didnt work!Also I did try to get back to the E. side and get up trought the chain, but when I climbed up the wall was not destrocted and I cant get back now!?
Please Help me!!!

PS: Sorry for my really really bad English XD

This explanation probably makes you a even more confused.

Spoiler below!

In case you are wondering how to proceed after fixing the "great" clock. You are supposed to use it's giant machinery to reach other-side. Basically it is a very basic jumping puzzle.