Can't install Acrobat 9 on IMac with El Capitan OS

I recently reformatted my hard drive on my IMac and then installed the EI Capitan OS. After doing so, I reinstalled Web Premium 5 and Acrobat 9, which came along with my software bundle. Everything installed fine except the Acrobat. It keeps giving me an error that I can't even read. Any suggestions? I use Acrobat all the time and desperately need it to work.