I'm currently in north eastern Angola in the bush, miles from anywhere at a prospecting camp (about 120 miles from the nearest porcelain toilet

They have two Motorola CM-140's that I have programmed up for them, and they are interfaced by a ZR310 panel. The panel currently lights the "Rx" light when the receiver radio is receiveing, but it's not keying the transmitter.
I have programmed both radios with the CM-140 software configuration for the ZR310 but I just can't get the darned thing to work.
Do I have to alter the programming of the Zetron, and if so, can this be done in the bush?
I eagerly await some info, if anyone is able to assist.
Regards,
Marc ZS6HZ