Murphdawg,
Do you have anything plugged into your USB ports on the chassis? Have you made sure to get the latest software version and USB updates? The Compact Flash is not USB so I wouldn't think that would send out that particular error if it was having a problem, but I have had it where the USB Drive we plugged into the chassis wasn't supported and was having issues when the system came up; throwing an error.
Thanks,
TE