rope glitches please help!!!

[amitc1612]

please someone help me!!!
my game is having problems with ropes.
it first begun in the cistern control room, where you enter the first room from the right
there are only two weight instead of three, and the third one is going through the wall in
some sort of weird glitch.
the second issue is neer the transpet, in the room with the well, the rope you need to attach the meat with is missing.
the last problem is where you are locked in a cell after you enter the chancel, the well where you find the key is also missing a rope!!!
i got some save games but i'm afraid i will miss a part of the game.
can someone please find a way to fix the problem!?
details:
operating system - windows 7 64-bit
desktop computer not laptop