If there's something going wrong with your model during conversion, then you need to check a couple things:
1. Make sure there are no duplicate vertices.
2. All the normals are facing the right direction.
3. The model is triangulated sometime before you make a .POF.
4. There are no holes in the mesh.
5. Object location are set to plane origin.
6. Your hierarchy is correct with the base object being "detail0".
Edit: If it's not one of these, I don't know what it could be. All of the errors I've gotten, except for one type, come from that list. The exception was when I rotated an object instead of rotating the polies that make up the object which made the POF read a subobject incorrectly, making it tilted about 30 degrees.