Float Key Controllers?

I'm making a model in 3ds Max 5 with the Art Tools, and I've been following the pdf Tutorial, but every time I try to preview the model, it says that my bones can't be animated because they use float key controllers, can someone help?

Click on each bone separately, and do what I say for each.

Go to the fourth tab on the right, the one with a wheel on it.

Under "Assign controller" Click on position, and set it to TCB. Do the same for Rotation and Scale. All TCB.

Then after that's done for all bones, preview it.

Oh, sweet it worked, thanks!

My pleasure.

Better use Bezier for Translation & Scale, is Easier to control than TCB.

What's the difference between these controllers aniway? I really want to know, because I suck when it comes to the technical aspects. :(

All I know is that TCB always seems to work for Wc3 : P

with bezier you controll the animation transition between two frames using curves, with TCB you have 3 parameters to control those transitions: Tension, Continuity and Bias. This transition thing between frames is what causses sometime the damm shakky movement, you can use the parameters or the curves to ease the shakyness. I just recently knew about all of this so Im not entirely sure if the shakiness can be eliminated at all(it worked for me :/ sometimes), but Ive read that to avoid it you must place keyframes at a constant distance.

Ya kinda, that's why I use Bezier.

Well to Explain:

Bezier Controller: Is a non-linear controller based on the well known Bezier curves.

Advantages:
happen to use less keys than other controllers.

controls the curve's InTan and OuTan, allowing the user to smooth the animation himself.

faster processing than other curves.