Installing Acrobat 9 pro on Mac El Capitan (v10.11.1)

I have a problem installing Adobe Acrobat Pro 9 on Mac El Capitan (v10.11.1). I already have downloaded Acrobat 9 pro using the following link:

https://helpx.adobe.com/de/acrobat/kb/acrobat-8-9-product-downloads.html

After downloading I followed the instructions in the "Read Me" file. On my first try I chose to install PDF-Printer and Safari-AddOns, after clicking next, the setup did not do anything. The second time I did not choose any extras and clicked next to put in my serial. After putting in my serial and clicking next again nothing happend.

I was able to start the program from the image but the program was not installed.

How can I install the program on my Mac?

Thx for your answer in advance.