Converting into an as2 class

Hi everybody,
i’m trying to convert an existing souce into an as2 class (the purpose is learning some more indeed). The conversion is almost finished, i belive, but now i can’t go further forward, I’ve something undefined (the object _cameraView.targ in the function “selectObject” in the Space3D class). The original code was from a great 3d tutorial at this (
The zip file include: 01.fla my modified and working source with no class; 02.fla the new one which use the class Space3D.
I would like to know what’s wrong. If someone could take a look at this attached source. Thanks.