Thanks Rudy. I had the same issue after CS4's uninstaller destroyed my CS5 installation. I had to reinstall CS5 entirely.

Even after doing so, Acrobat refuses to run - gives me the same "activation needed" message as it did you.

So, like you, I installed Acrobat again from the original DVD.

Yet, I'm still having the same problem from Acrobat and cannot use the product. I've launched the other CS5 programs and they run fine.

Would be nice if Adobe could figure out these install and uninstall routines.

Anyone else know what I should do here?

getting help from adobe support is INFURIATING they dont call when they say they will and the online chat people know nothing.

Go to adobe.com and download the Adobe Cleaner Tool.

A link to that tool can be found in cpsid_82947

Even if you have uninstalled your previous suite (CS4 and/or CS3) there might be traces of the said suite(s)

And you can removed them by this tool.

Uninstall Acrobat 9 Pro, then reinstall it.

Once reinstalled, launch Acrobat 9 Pro.

Accept the EULA then enter the Acrobat 9 Pro serial number.

re-installed the CS5 suite , but still Acrobat Pro 9 refuses to launch EVEN  with Photoshop open!!!

Message was edited by: bici

Look on the paper Sleeve of the Acrobat Install DVD. Go to Registration or activation  either will be in The Acrobat menu or the Help menu. (Some apps put in help menu- others in the Application name menu.) Type in that number. make sure every letter or number is correct and with letters make sure the are in proper captitalization (case).

Although Technically not part of the CS5 install Package is added as spearate install when you buy CS5.

I ran the Adobe uninstaller and the Adobe Cleaner.

I uninstalled Adobe Pro

I ran the Adobe Uninstall and I deleted the Adobe suite.

I deleted every single file that I could find on my hard drive that had to do with Adobe.

I re-installed the CS5 SUITE. I tested all the programs and they worked fine.

I copied the Acrobat pro into my Applications folder. I started up and it asked me to accept the licence info. I said OK..  then it quit!! WTF! am i supposed to do to use a product that i paid for!!!!

@ xirtame

Have you tried all the steps outlined in Larry G. Schneider's post?

i was not able to solve this issue / problem. A real disappointment as I spent days trying to resolve it!  Adobe should be ashamed.

I installed my copy of Acrobat Pro on my son's computer. He is running Lion as well, It prompted me for the licence code, something that was _NOT_ happening on my computer when I tried to install it. Installed on his machine no problem and is working fine.

I ended up purchasing a copy of Acrobat Pro X from a co-worker who didn't need  his copy for very little.

I have cs4 and cs5 master collection installed.  I opened both Photoshop from CS4 and CS5 at the same time, then opened Acrobat from the applications folder, and the message went away.  I had open both before, but not at the same time.  Good Luck

Dee Gardner

USA

I was having the same problem, having just migrated CS5 Design Standard to OS X 10.7, Acrobat 9 stopped working and gave the error 'Suite Product Activation Needed' which did not work...

a (very helpful) discussion on livechat with Adobe suggested:

1. changing the name of cache.db in Library/Application Support/Adobe/Adobe PCD to cache.old, then trying to start Acrobat

if that did not work, try

2. deleting the FlexNet Publisher folder in Library/Application Support, which when you try to start Acrobat should now allow you to re-enter the serial number

worked for me, anyway...