Cant change my ROC Cdkey?

Hey guys,

Ive just been trying to change the CDKEY of Reign of Chaos but nothing comes up on the cd key changer....running version 1.21 of Warcraft III.

Using 32 bit and I have tried using it as an administrator (i am on an admin account on the computer aswell) and in compatibility mode for Windows XP.

Any other ideas? Heres a screen shot.

PS: I have a Frozen Throne cd key changer and that works fine.