Top-down racing game.

So I have one working AS2 file, which I have tried to convert into a AS3 file. Do you have any ideas why the car behaves so weird in the as3 file?
This is the working AS2 file;
http://www.2shared.c...ed_Min_Bil.html
This is the Not Working AS3 file;
http://www.2shared.c...3_Bilspill.html
The comments and some of the code is in Norwegian, please let me know if I should translate it to english.
Any Ideas what I have to do to make the as3 file work?
Best regards Simon