Need help with interfaceIT to IFlyToFsuipc (on JetMax 737 cockpit)

Can anyone offer a suggestion? I have the JetMax737 cockpit and iFly Pro Cockpit Builder for FSX running on a Windows 7 PC.
I start FSX. Load an iFly 737. Start IFlyToFsuipc. Start interfaceIT. Import the FSUIPCOffsets.xml. I see a Module load message scroll across FSX. The LED test in interfaceIT works - all LEDs light up. But then nothing else works - no switches or lights on the cockpit do anything when pressed/toggled/rotated/etc. When I exit out of interfaceIT, a module unload message scrolls on FSX. Any help or suggestions would be appreciated. Jeff