Comodo Backup 3.0 fails to do system backup

I have recently installed CBU 3.0 and get the error message contained in the aattached screenshot (Back up failed).
I run Windows XP and have a second harddrive that I use as the backup target.
What’s happening??

I have tried three times, always stops after 9%.
Backing up files to the same drive works OK.

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Hi

This error indicates data error (cyclic redundancy check).
Please run check disk to be sure there aren’t any problems.

Thanks

Thanks :-TU