Transponder switches through IItcreator

Having some problems using Transponder with switches programmed through Interfaceit card and IITcreator. I note posts having similar difficulties with other hardware interfaces.
Status as follows:
Squawk ident works fine.
Transponder not working. If I try to program the switch I can achieve On (Mode C) with switch down. If I program Off (Mode stby) with switch up it defaults back to On even though I have saved the setting.
Auto Mode C in vPilot is off.
Similar problem trying to program TCAS, all switch positions default to TA/RA whatever settings are programmed and saved.
Altrpt switches also default but I don't know what those do anyway.
Anyone anything to share?
Barry
wwwa320sim.com