Scripting Trouble

Just getting into Flash scripting, I’m not sure how hard what I’m trying to do would be. The idea is the links activate when they’re drag/dropped above a wire onto which they’d catch/drop if not brought high enough. I’ve played with gravity some, but haven’t been able to figure how to have something land on the wire. Here is what I’ve put together so far. Was wondering if someone knew anything about this.

Ah, and another thing. Anyone using Firefox will notice that the sky’s colors are mismatched. Is there a way I can fix that? Looks fine in IE.