[rbayer]

Electrically, I think you are doing the right thing in terms of pins. However, you shouldn't be reading +5 anywhere. Are you sure you wired this stuff into the digital inputs port on the RC and not the analog? It looks like that may be the problem as pins 3,6,17,and 20 all carry +5V on the analog port. If you move your connector to the digital input port, it should work.