Also, you may be having an issue that both instances of the OSC composition are attempting to use the same port. If that is the case, do this:
0) Open the kinect composition.
2) Close the above original composition, ensuring both editor and viewer are closed
3) Open the Syphon comp
You (generally) cant have 2 applications or instance of a socket open on the same port (listening or sending). If you have 2 open versions of some OSC plugin, it wont like that I suspect.