Guten morgan Herr Benjamino, While the bones are supposedly attached, double click on any listed part of the model within the hierarchy. This would validate whether it is indeed in primitive vertex format. If the part opens in the vertex modeler... click on any polygon to activate the properties button for bone influences. When that button is available it will display all bones specified to influence regions you have selected. If none of this happens, then the bones are not attached and, most likely, the model is not in vertex format. Hope this helps you diagnose the problem. Jeff Reid