If u just cut the red wire thats not gonna do it.. All your doing is killing power to the beep.. BUT the beep has to have power going to it or the radio wont key up as the transmit wire runs thru the roger beep..
Look at the beep... Undo the red, black, white, and green wire fom the radio... U should have one more wire coming from the radio to the beep.. Undo this wire from the beep and connect it to the mic jac where the green wire was attached..
hope this helps, if not just let me know.
Demon