I've found the problem, but not sure how to solve it.
It seems that Blender doesn't export "frames".
I opened the driver.x model that comes with Blitz3D in Notepad and there are Frames present.
I've modified my station.x file to include those and now I have 5 children, as needed.
So, now I guess I have to make a program to "import" those frame-sections into my model-files, so each Mesh-section has a Frame-section.
It seems that Blender doesn't export "frames".
I opened the driver.x model that comes with Blitz3D in Notepad and there are Frames present.
I've modified my station.x file to include those and now I have 5 children, as needed.
So, now I guess I have to make a program to "import" those frame-sections into my model-files, so each Mesh-section has a Frame-section.