Does anybody know why my mercury does't let me program trasponder 11890/h/1666 kftl. on amc 6 72.0w? if i put every thing manual it receives signal 47-54 quality and at the time i want to store the trasponder it says invalid parameter. why??? also I've tried the list freq/sr and does the same. also I've tried blind scaning and it never finds it. anybody with this issue???