copying already copied games

[tomtom]

hi all.. how can i copy allready copied games using nero. I have copied one already several times and the box wont recognise disk. when i open the original copied disk i can get all the files and folders to open and when its copied the new disk has exactly the same as the original, but its not recognised. can anyone tell me what settings to use in nero. and also i cant even get the box to read an evolution x disk, how do i burn this also.