Hi HOPMACHO,
Can you tell me what DCC you’re using(Maya, Max, Blender)? And can you also send me an example fbx file with the original .mb, .max, or .blend files?
Usually this is an issue like MakkerFelix mentioned or a bad exporter (older blender versions broke fbx files), but on the off chance that it’s truly our importer, then we can bug it and go from there.