Hi All I am super happy with my G90 relay that i bought second hand. so happy that i decided to order a second TBP12 transmitter to use on stage with my second bass. when i received it (brand new) yesterday i realized it didn't work. Battery are new (battery logo is fully charged) Audio light is green, so the transmitter seems to receive a signal from the instrument whatever the channel i select, the G90 receiver keeps showing "no signal" on the screen, but my old TBP12 transmitter works fine on every channel i tryed. i thought maybe there was a kind of a setup to do on a new transmitter by i haven't seen anything like that on the manual? (and if something was done on the old one i can't do the same since i bought it used. thank you guys for your help! Alex