I have a BCM400 4.0 which is current loaded with 112 VM seats. I have Two unused auth codes. Nortel part numbers NTKC0011 for 4 VM seats and NTKC0012 for 8 VM Seats. My question is can these Auth Codes be used on my BCM 50 instead? I really don't need more VM seats on my BCM400. Any help greatly appreciated.