if the paddle (rocker) switch is only working in one direction, you wont be able to reverse the flow.
quick test ,
disconnect the hyd hoses to your attachment,
start the engine,
turn on the aux at the dash,
pull the trigger on the RH handle, the engine should bog down, pull it again, and the eng RPM should return to normal.
now try just using the RH paddle switch in both directions, you should hear the engine bog down when the switch is in either direction.
if you have an electrical problem, the controller will sense it, and set an active code, if the machine beeps 3 times,( assuming the warning buzzer works), do NOT turn the key off, press and hold the light switch and watch the hr meter display, if theres an active code the display will change to a 4 digit number XX-XX. you may have more than one code, so make sure you give the display a chance to scroll through.
if theres no active codes, i'd suspect you may have a bad aux solenoid stem, or possibly a problem with the aux spool itself.
aux solenoids are at the front and rear of the control valve, sometimes sticking straight up, sometimes pointing towards the middle of the machine.