Adobe Acrobat 9 install disc

Hello,

I currently have a Mac Pro with the CS5 Design suite installed. I just purchased a Macbook Pro and I'm installing all the software, however, when I go to install Adobe Acrobat 9 from its CD - it just opens the application rather than install it. Any idea as to what happened to the installer? I wasn't sure if this was the right forum or not but I thought I would try here first. I appreciate any/all help. Thank you.