ok i found what the problem was, the model (.x) had to be centered... so what i mean is...

if the model is 1, 1, 1 in 3dsmax

i had to move the z co-ordinate to -0.5 why is this? and is there a way to set the mesh even if it has not been centered in 3ds max?

thanks in advance.

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another problem.. on my computer. the box's drop at a steady rate, on my wifes laptop, they drop very fast and even bounce.

which looks like it has something todo with newton update? when my FPS is low they drop fast. when it is high, they drop slow.