Hitman: Contracts - FreeCam [PC]

Hello everybody! I’m trying to unlock freecam on Hitman: Contracts [PC]. I based it on Hitman 2: Silent Assassin adding the lines in the HitmanContracts.cfg file:

<Mapping Action="ToggleFreeCam" Activation="None">
<Key SCode="K_K" Device="Keyboard"/>
</Mapping>

It doesn’t work! Why?
Thanks!