cant output extrusion in Swift3d

[Metacomet]

i made a project in 3dmax, very simple, 2 wheels that start flat and then over the frames get extruded, thats it. I export the project to a 3ds format to load it in Swift 3d and then vectorize it, but when ever i load it in swift3d the project structure changes, i lost the extrusion, i can only see the wheels, but NO EXTRUSION, all animated cameras and changes of angles and movements are untouched but the extrusions are lost!

Hope you can help out with this.

tech data: 3dmax 6, swift 3d 2, also tryed in 3dmax 2.5 and swift 3d 3.