AppUpdate License Key validation problem with ocx (wodAppUpdate)

I have a licensed version of wodAppUp.ocx

If I run the program (developed with Windev) with system XP, it works fine. It installs component and use normally
But if I run the program on a PC with system Vista(with admin privileges), I get the pop-up saying The product requires valid license key, but no such key is found. You have no rights to use this product in design environment.

The versions used are: 1.2.9.77 or 1.3.5.100 (same problem)
I'll appreciate any help on this matter.

Thanks in advance,

GLA