I am trying to configure one of my clients to use 'engine = capi', but cannot find a way to define which Key to actually use. 

debug = 7 does not show engine internal actions and 
engineCtrl = CAPI_CMD_DEBUG_LEVEL:2 gives an error, as well as
engineCtrl = DEBUG_LEVEL:2

I'de appreciate any help with configuring this. 

Thanks in advance, 

Shay