The Adobe download page gives only the install download file for Acrobat 9 Pro, and the "My Products" license page shows Acrobat 9 without any mention of 'Pro'. I believe this means my License is for 9 Standard. The Key does not work for the 'Pro'

Randall Walker if you purchased Acrobat 9 Standard from Adobe directly, and choose the download option at the time of purchase, then the installation files will be available under your account.  You can find more details at Find a download link on Adobe.com.

If you previously purchased Acrobat 9 Standard on a CD then I would recommend locating the CD.  You can transfer the installation files to a USB drive if you need to install on a computer which does not contain an optical drive.

Downloads available:

• Suites and Programs:  CC 2014 | CC | CS6 | CS5.5 | CS5 | CS4 | CS3
• Acrobat:  XI, X | 9,8 | 9 standard
• Premiere Elements:  12 | 11, 10 | 9, 8, 7
• Photoshop Elements:  12 | 11, 10 | 9,8,7
• Lightroom:  5.6| 5 | 4 | 3
• Captivate:  8 | 7 | 6 | 5
• Contribute:  CS5 | CS4, CS3

Download and installation help for Adobe links

Download and installation help for Prodesigntools links are listed on most linked pages.  They are critical; especially steps 1, 2 and 3.  If you click a link that does not have those steps listed, open a second window using the Lightroom 3 link to see those 'Important Instructions'.