First of all by the looks of it Mark has obviously saved the 37 as a 3ds file so you need to import this into 3d Canvas which i can only assume it didnt like, the second thing was is not fully understanding how a model is constructed to work in msts, i thought i did and in reality i didnt a harsh lesson for a 30 year old
as you can see form the images below on the left is how it was imported - nothing is in groups etc etc on the right is how it should be to work

