The dropped frames show up on the Mojo output only. It is fine on the computer monitor. My firewire card is Avid approved Texas Instruments chipset. I also checked the IRQ and made sure no other devices were on that IRQ 23. I moved the Mojo over to my old HP and it works fine. It won’t do much layering without rendering.
OH well. Maybe the new Pentium i7 Quad core with Hyperthreading Processor is creating a bottleneck somewhere.