Product Registration Problem - "enter the correct serial number"

Hi.

Sorry for mirroring thread.

Some time ago I bought at one of the international sites aukyjnych Adobe Photoshop CS5 Extended.
The program installed without a problem, the license key that I need to provide during the installation enter correctly, but when I wanted to register the program on the Adobe website receives message "enter the correct serial number."
Unfortunately, the answer from a local Support team already waiting more than two week, and I can not contact any other way.

What can I do in this situation?

(sorry for poor English)