Hi Brian, thanks for your reply, y have followed step by step your fix but when y turns off the AP (after changing to VOR/LOC mode) the glide goes down again, y mean with AP on in HEADING or NAV (DNS)
mode the glide slope goes down without moving, if you goes to VOR/LOC mode the glide get working, so then y disconect the AP but the glide goes down again out of working. :-X