I tried to remember the code for my radio and tried 3 times...and now it has an OFF code...read the owners manual and tried all permutations...is the unit OFF when it says off...when you hit the power button it goes off so is it on???? waited the requisite 2 hours and still error code OFF any one walk me through this one..???? the book says ...key in position one...unit turned on ...wait 2 hours...so do you enter the code with the unit on which looks off or with it turned on which looks off ????