ok so i own a spektrum radio and just got an airtronics m11 with dsm... with the spektrum my car have reverse... but not with the m11... i have mamba systems in 2/4 of my cars and the other 2 are on my spektrum... i hooked up the mambas to my comp and updated em both but i have to hold the throttle till the yellow light comes on then my motor is available... problem is i still dont have reverse... everything on my radio is still on stock numbers... i havnt touched any of that... ive read the manual twice... is there something im missing...