Hi everyone, I have been having a problem when trying to do ILS landings. When I get to the final approach altitude before it catches the glide scope, when I turn on approach mode, altitude hold does not disengage and the auto-pilot does not start bringing the plane down. Even if I press the altitude hold button, it still won't turn off, it still stays at the final approach altitude. How do I turn the altitude hold off?

Many thanks, Dave