Thanks guys. I tried Bills program he posted in the other thread, to check on the crystals, and low-and-behold everything started working again. I suspect that I somehow messed up my oscillator settings, and I don't know enough yet, as to what to check etc. Having reprogrammed with "good settings" everything seems to be working again.
Three steps forward... two steps back.. three steps forward...
(time for bed)
Thanks again everyone. Have a good "what's left of your evening"