UltraISO Problem

when i go to make cd/dvd image and then select the option >
Standard ISO(*.ISO) they dont wanna work in my emulator but if i use Alcohol 120% and select (CCD) they work fine. anyone know why the .ISO files created by UltraISO wont work for some reason thanks

I get the same problem with MagicISO.

I just use Daemon tools now -.-;;

Annoying having to change disks with it though.