Treasure Trail query

Treasure Trail query

Hi I have got as far as Treasure Trail and got to the part where you have to cross the platforms and ledges to pull the keys down in order to open the window (I hope that makes sense). I have managed the left hand key but am unsure how to get to the right hand side. If I pull down the key and go to the right, swing across the chain and land on a platform I can't seem to get anywhere from that platform, but I seem unable to go back the way I came, and even if I did manage it I'm still not sure how to get to the right hand key!
I am finding this very frustrating as every time I fall off a platform (by trying to jump somewhere I can't), it takes me back!!!

Comment:(Mar 3 2010) I just wanted to say, I have finally done this after many many tries so no need to answer it now.