sounds to me like either the elevator isn't using c_move (or even ent_move for that matter) or its push value is higher than that of the model standing on it. this would be a problem if the model's origin is too low or its bounding box surrounds it too well because then whatever trace it is doing to detect the ground won't try to push it above anything that comes too close.

or, like Nems said, calm down and give the AAUMs (the extra A is for Awesome) a go

julz