This is a user forum not Adobe Support. When you install CS6 does it get Activated during the install process when yoy sign with your Adobe Userid and Password or does it just install as a 30 Trial.
Use Photoshop menu help and look at the items in the menu. Does it show Activate or Deactivate. If it shows Activate it not an activated install.
Only two machines can be Activated at any given time have you been deactivating machines so you can activate others?
If activation rejects your serial it may be you have two other machines activated... so you have no remaining activation that can be activated.
Did you purchase CS6 while at the Academy of Art University?
Yeah, apparently you can't contact Adobe support unless you have Adobe cloud or for the first 90 days after software installation. The forums were the only option they gave me. It won't even let me in, it just shows an ad for Adobe Cloud and a button that says "License this software." When I put my license number in, it rejects it. Thanks.
No, I don't go to the Academy of Art University.
Just curious as Adobe had special licensing with them that only retained activation of the license while you were a student at the school.
Go here, Activation & Deactivation Help, and select one of the options. Most likely you'll need to select the Still Need Help option which is all the way at the bottom of the screen.
With a CS6 license you should be able to log into the Adobe website, click on your name in the upper right corner then > Manage Account > Plans & Products > View other products. This will then bring up a list of all the Adobe applications associated with your Adobe login. If you don't see CS6 listed you should be able to click on Register new products and enter your serial number to add it. If it doesn't accept the number then that by where the primary issue is.
I checked the CS6 serial number registered to your account and it has expired. This is expected if an educational establishment has a term licensing agreement with Adobe.
Please contact your educational establishment to see what options they have for you.