is this supposed to happen?

well this is great and all, but the thing i want to learn about the most has errors in the examples and i feel that i cannot learn it properly with it the way it is.

under actionscript under collision detection
the first few examples are fine, but when i try to drag the others, they just disappear. This does not let me test what they are teaching.

also, for some reason the music doesn't download so i cant hear anything.

plz help me out.