Tween Class trouble (based on the tutorial)

programming flash
1

Hey hey hey.

I was gonna have a fiddle with this tutorial http://www.kirupa.com/developer/actionscript/tween.htm
so I downloaded, unzipped, saved and published it. I didn’t have a chance to fiddle with anything and it’s already broken! I get this:

Error Scene=Scene 1, layer=actions, frame=1:Line 5: There is no property with the name ‘onMotionFinished’.
xScaleT.onMotionFinished = function() {

Error Scene=Scene 1, layer=actions, frame=1:Line 8: There is no property with the name ‘onMotionFinished’.
xPosT.onMotionFinished = function() {

Total ActionScript Errors: 2 Reported Errors: 2

Any ideas why guys? Cheers in advance.

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Edit: MX04 by the way.