Darky Key Changer

I have downloaded his key changer/checker and I run it as administrator with full control

But whenever I go to change the key I get:

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Failed to set Key!

Error Code: 5

Error Message: Access is denied

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Would appreciate help and whatnot

Did you download and execute an "Bypass" from youtube if yes, then your key just got stolen.

Go to regedit thev find arma 2 oa and change the permissions. I can teamviewer u add me on skype.
Skype: xCyberxx

Did you ran Darky's Keychanger on a pc with arma 2?