I have the VIP 612 and have locked it with passwords no one knows but me. However, my son is capable of unlocking the system. I have talked to Dishnetwork's tech support two times and they insist it is impossible to unlock it without them sending a signal. They have told me such signal has never been either requested nor sent. I have set up passwords 3 times that no one knows it but me. It is impossible it has been discovered by simple trial and error in such a short time. Can anybody help me understand how this can happen and if it can be prevented?