Legion

OK so I finally got it to burn and right at the end i get the error: Finalise disc failed Device: xxxxxxxxxxxxxxxxx Reason: Access is denied. HELP!!!

Game- xbox 360

Hi, sorry to be a pain in the ass but I've just devoted a whole day of my life to this and am not about to give up now lol. When I trey to burn an 8.5GB iso file to a disk i get the error that there's not enough space on my disk. Apparently my image size is 4,267,015 sectors (8,334mb) and my disk is 4,173,824 sectors (8,152mb) The disks are Verbatim 8x DVD+R DL and the reel says that they hold 8.5GB/240 mins? Is there any way I can get this image onto the disk? Anyhelp would be appreciated...