Flash Animation- Please Help

[macwiz]

Hi. If you take a look at the file, and play it right in Flash CS3, it works fine. However, when you use the test movie feature, the car goes all over the place. Anyone know why?

Flash File (http://idisk.mac.com/macwiz1220-Public/racetrack.fla)

Thanks!

[gnomeontherun]

Your guide line is not solid, redraw it and use a stroke that does not break.