Thanks everybody sofar for the answers. Sofar no solution yet. To Quadraxas and EvilSOB, the bone rotates in every client and server, that's not the problem. What happens is that the angle of the bone rotates but the attached vertices do not follow. This only happens on every client that connects after this client. While on the client that created the model it turns good but on the sametime it doesn't turn on every other client that connects after. It does turn however on every client that was connected before this particular client.