I've got an 811S, flashed using the Omnipatcher utility (now using the combo firmware flash) and I'm getting a "communication failure" when using Alcohol 120 to burn an iso image. I've tried two different types of media (Princo 4x and Datawrite grey 8x) with the same results - comms failure about 1/3rd through. Even using the simulation settings in Alcohol the same thing happens. I'm using an 80-pin UDMA connector and the burner is the slave on the cable. I've not done anything else while I've tried to burn, just set it to go and left it.
Any thoughts as to what might be causing this?