Aah, I see what you mean. I don't have max 6.0.

The only animation I got is the sliding along the axis, but no vertex changes. Only with the skin modifier I get some vertex changes. When I change 1 vertex position it's ok in max, but I see nothing move in med. I will search for an max_to_mdl plugin. Maybe that will help.

EDIT:

Is there a exporter to mdl in blender? Because blender is a free program. Maybe there's an possibility to export the max file into blender and then export it to med (with animations offcourse).