Can't finish the installation of Creative Suite 4-Design Premium for Mac, what can I do?

Hello!

My problem is, that after the installation of the first CD of the Adobe Creative Suite 4 installation package, my computer doesn't start to install the second CD if I put it in the external CD drive. There is no problem with installation of the first CD, only with the second. My Macbook recognizes the CD (you see it in Finder), but does not start to install.

Here's the screenshot when I put the CD in the external drive: now I can't press any button except "Beenden" (Exit).

I'm working with the OS X Yosemite, version 10.10.5. I've already tried other external drives, but it is always the same problem.

Thanks for the help!