Error message in frame counter display

I

iamsean

I'm puzzled - when I load film into my T2, the frame counter display reads "FF" and sometimes "FO" and I can't shoot. What the hell does this mean?!
It seems to me that the camera is not reading the flim information properly, has anyone else had a similar problem, and can they tell me what happened next? Or does anyone know what the letters indicate? I have downloaded most of a manual from the net but there's nothing on this on the pages I have.
Desperate for information,
Sean
 
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