Registration failed

I payd “succellfully” for my DVD2one and recived a user name and registration number. I tryed to enter the name and number but it dosent work. It always shows a window with the message that I wrote a unvalid user name and reg. nr. I tryed typing direktly, copy and paste. It wont work. I work on a Mac Powerbook G4 with OS X 10.2.5. What can I do?

Have you downloaded the latest version?
Tthere where some issues with character sets in the initial release.