Issues with multiple possiblities with multiple buttons

here’s what I’ve got:

three buttons (oneBtn, twoBtn, threeBtn). Click a given button, and onRelease a movie clip (noOne, noTwo, noThree) slides from x position 150 to x position 450.

here’s what I want to happen:

say movie clip noTwo is already at position 450. When you click oneBtn, clip noTwo slides left to position 150, while clip noOne slides right to 450. And so on, ad nauseum.

I’ve tried a number of different ways to attack it as an if/else, and/or, etc. Nothing works right.

I’m attaching a . zip with the .fla. I’m using MX 2004, AS 2.