[Elecraft] KX3 2 meter module help with amp keying

[ejkkjh at gmail.com]

I am using my KX3 2 meter module with a small amp.  The amp has a  keying input, when it goes to ground it keys the amp.  I have the ACC2 module/cable plugged into the ACC2 connector of the KX3.  The KX3 keys the amp to xmit but it does it on all bands, not just 2 meters.  The XV2 ADR write up in manual says to set it to TRN CTRL but that option does not come up in my menu?  I am using the RCA connector on the ACC2 cable and not sure what the 1/8 female stereo connector is used for?  The menu for ACC2 IO is now set to LO-PTT.
I have spent quite a bit of time with this but not sure what to do next?
I have a 222 meter transverter on XV1 but I have not checked it yet since I started using the KX3 2 meter module, once I get it working correctly I will see if the transverter still works and is keyed correctly.  
Any help or ideas would be appreciated.  Thank you  73
Emory  WM3M