Creating a psx iso backup

Hi. I have a problem with creating a psx game cd-backup. When i put an original cd in and run emulator everything is working fine game is running very good. I can explore the cd and i can see some files on it. the problem starts when i try to create a cd image. Irun some program like alcohol120 or magiciso and it creates a image but when i try to run it in a virtual cddrive it says that disc is not formatted and it’s could be using format not compatibile with windows. I got same problem with other psx cd-images that im sure they were running under me/98. I think this is some windows problem but i cant get any answer.