I just purchased a 2006 Dynasty 42 that has an outside unlock security pad. I found the reset button in the armrest to try and reset the entry code. (previous owner did not use) when I press the reset, I get the 4 beeps but using the master reset code produces no results. The keypad lights up with the reset button and times out with two beeps a few minutes later but it still doesn't work. Is the unit broken, or am I doing something wrong.