Help backing up sims 2 disks

Hi i need to back up my sims 2 pc game disks.

I have tried to copy them, the disks have all the info on them but it has an error message saying you need to insert original disks.

Is there a way to copy the disks? and have them work?

I’ve been using Nero with anydvd.

Any ideas???

Zoepiglet