Sims 2 Cannot find CD

I downloaded The Sims 2 Complete Collection today, but only installed Sims 2 And Sims 2 University for now, just to get playing, but as soon as I tried to start playing, a little screen popped up saying to make sure I had the correct disk entered then restart the application. So I'd mount the Sims 2 University Disk 1 again and restart it, but it'd say the same thing. Is there something I'm doing wrong? What disk should I have mounted to the D: Drive?

Hi,

Please read this: https://games4theworld.forumotion.com/fixes-f18/the-sims-2-pets-is-missing-the-nocd-crack-fix-t124.htm

//EDIT

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-NARONG30