[flash8 as2.0 help please, with menu slider problem ><

I’m realy new to AS and flash, but I feel i’m learning quit alot and quit fast, but I have a realy stupid problem with a sliding menu I did.
the effect is that onRollOver the links slides down to a target on _y and fades out at the same time … it works well, only sometimes (quit often) it seems to get stuck midway and fade out and it looks bad
I’ve added the fla, if anyone can help me out, that would be realy great

ps : feel free to reuse my modest effect =]