mp3 player: 1061 and 1119 error

Hey guys,
I’m actually just starting to learn AS again and decided to go learn AS 3.0. I found an mp3 tutorial from but i think he used AS 2.0 to make that player coz when I tried to implement all the things he did I can’t get it to play (btw, I’m still on Part I).

So basically I get these two errors:

1061: Call to a possibly undefined method loadSound through a reference with static type
1119: Access of possibly undefined property onSoundComplete through a reference with static type

can somebody enlighten me…:trout: