No CA found by 2nd stage loader, please contact support at dream-multimedia!

While trying to boot my DM800 it comes up with "error", i've tried using dreamup (only way i can get access to unit) with null modem cable and following message appears:

"No CA found by 2nd stage loader, please contact support at dream-multimedia!"

Please help I have been searching net for last 5hours for clues and workarounds but none of them work. Using dreamup does give me browser access to upload firmware but when the unit reboots I am back to the beginning with "error". i have tried a couple different versions of firmware all fail.

NOTE: MY BOX IS NOT A CLONE. It is approx a year old i bought from dreamboxshop.co.uk, Knowing my luck tho prob just over!

Advise Please!!!