Reloading CS5 upgrade using CS2 serial number

[alkathdale]

Several years ago I upgraded from Photoshop CS2 to CS5.  I recently had to have my computer reformatted.  When I have tried to reload my CS5 upgrade using the CS2 serial number it isn't accepted.  I went to the Adobe site and downloaded CS2 but I still can't reload my CS5 disk.  From Adobe it seems I need a code to unlock the CS2 activation but I can't seem to get help this way.  Now what do I do?

[John Waller]

Now what do I do?

No need to -re-install CS2 at all.

Just install the CS5 upgrade (the upgrade contains the full program code), enter your CS5 upgrade serial number then enter your CS2 serial number when prompted.

[alkathdale]

Thanks for the suggestion; however, that's what I tried first.  I did retry but got the same message.  Adobe no longer supports activation of CS2 and the installation process does not recognize CS2 as an acceptable program to update from.  I just went ahead and installed as a trial.  It seems to have worked.