Also, if you're using BlueStreak, be sure to convert your model to Editable Mesh before export if you modelled it in Poly. Convert it BEFORE applying skin modifier, or you could weigh the verts, save the weights (theres a save button, it saves a text file) which you can then load after you've converted to mesh.

If you dont do this, your model usually gets compiled in little chunks with large chunks of geometry missing. Which is bad!