IWS - CustomCommand

Is there any permissions needs to be enabled inorder to execute ChainOfCommand ? Code snippet provided below. It does not work in client environment.

commandManager.InsertCommandToChainOfCommandBefore(“InteractionVoiceAnswerCall”, “AnswerCall”,
new List(){ new CommandActivator(){ CommandType = typeof(AnswerCallCommand), Name=“BeforeAnswerCallCommand” }}

I logs i see the constructor initialized. But It does enter into Execute() method while answering call.

Thanks,
Aravind