Why won't Civ 4/ age of epires 3 ISO's work on my computer?

I have ISO's for civilization 4 and age of empires 3. I know they're work, and are exact copies of the original disks. I tried using Daemon tools with safe disk on, and I used safediskhider4 and tried running it. First I went to my documents and clicked drive G (Age of empires 3), and it installed. Then I click on play, and it started to load but then said "Please insert ago of empires 3 disk 1". The same thing happened with Civ. I downloaded a no CD crack, but whenever I clicked on it, i got the message "This application has failed to start because rockalldll.dll was not found. Re-installing the application may fix this problem.). A similar message appeared with the Civ crack. Any suggestions?

(And by the way, I can't make a new ISO or rip the disk)