using FAAST to control camera movement in nDisplay project

I’n trying to map the Gesture to the camera movement in Unreal for the nDisplay project.
the tool is FAAST (http://projects.ict.usc.edu/mxr/faast/) with OpenNI device (Asus Xtion Live pro)

the Gesture reading is Good. I try to map the movement to “w a s d” keys
When I try to check it in notepad the behavior of the program is good it show “w a s d” in notepad as I want.

However, when come to unreal in the play mode it seem not to listen to the mapped keyboard even from FAAST. the camera is not moving.

For more information I can use real keyboard “w a s d” to control the movement of the camera.

May I ask for suggestion? Hypothesis ?

Regards