Purchased CS4, but original product key no longer recognized

[rudyd67510381]

I purchased "Adobe Creative Suite 4 Master Collection" for the Mac several years ago. I recently had a hard drive failure. After replacing the hard drive and re-installing the app, when Adobe Acrobat is launched, it asks for my serial number. I type in the serial number that came with the product and get a red "X" implying that the number is no longer valid.

I do not want to upgrade, but would like to use the software I originally purchased. Please help!

Thank you.

[John T Smith · Accepted solution]

When I bought CS5 Master Collection, it came with two serial numbers... one for Acrobat, and one for everything else

Did your CS4 come with one serial number, or two?

Invalid License http://helpx.adobe.com/creative-suite/kb/error-serial-number-valid-product.html

-and more help in http://helpx.adobe.com/creative-suite/kb/invalid-serial-number-cs4.html