A-ray error

i have imaged F.E.A.R with alcohol and am burning to disc as my origional has a bit of a scratch so want to back it up just in case. when i add image to the twincreator in a-ray i get… error: file size is no multiple of 2448(image :2352, sub:96)
any idea what this means and how to fix it?? would appreciate the help as only just got the image after a day or two of trial and error due to the damage on disc.