Can you "find" them using HVACPro direct connected to the N2 bus ?
Double check your N2-bus wiring.
If so, I think there was a patch/upgrade available that may help (Rev 1.1 ?) If I remember right that FX is a rev 1.0. I will check and post more later.
If sense were so common everyone would have it !
All opinions expressed are my own. Any advice provided is based on personal experience, generally accepted fact or publicly available information. As such, it is worth exactly what you paid for it, not a penny more not a penny less !!