won't transmit

So I have my Icon 706 hooked up to a G5RV Jr 51ft. It won't transmit on any band on SSB. Is this because my SWR is high, 6 meters is a good example, on 6 meter FM my Auto Tuner clicks and tunes and tunes it to 1:1 SWR and everything is cool, but if I switch to SSB on 6meter my 706 won't...