Well, have you followed ALL the instructions
? I found you needed to add this at the top of the examples:
INCLUDE "NG COLLISION.DBA"
Make sure the "NG COLLISION.DBA" is in the same folder as the .EXE
[EDIT]
I advise NG because it saves alot of work but it can't handle really complex collisions (I think in v3 it can) such as high poly landscapes...I think it can but you need some manual code in. Just because it works out the collision process it doesnt mean you can be lazy and lie back!
1.9GHZ/Windows XP Home Edition/NVidia GeForce4Ti 4600/128MB RAM/60GB Hardrive