penumbra requiem for mac stuck on 03

[petrosth]

hi, its impossible to find a key to "toss" anything on this level (i ve got the mac game version). Ok, I put some boxes and i climbed on the second floor, and somehow the wooden box with the key exploded on the ground floor (i dont know how it happened this). Yet, it is impossible to "toss" the ketchup bottle on the chain. I cannot find the key or the way to use my mac mouse to "toss" the bottle high -it falls back killing me. I saw a video walkthrough, they were throwing the bottle very easily very high.. Please, give suggestions, i ll appreciate it very much as i cannot go on... (if y prefer, my email is petrosth@otenet.gr)..