I have a problem with connecting all of my Firewire drives at the same time. The problem started when I purchased 2 Plumax cases for a couple drives. What happens is that when both of the new drives in the new Plumax cases are plugged in to the machine at the same time (same Firewire port or different) they both dismount and are said to be unrecognizable. I have no idea why this would be happening since I have another 2 of the Plumax drive cases and they have worked fine in all situations. Any help with this situation would be appreciated. Thanx!