Hi, I have a D100 EFIS, Ap74 autopilot and a Garmin 796 GPS. The HDG and altitude mode is working fine, except the GPS NAV mode of the autopilot, it looks like the GPS is no communicating with the D100 and AP74. I've already tried many solutions discussed here, but the problem still, no comunication at all, it only says that the HS34 is not connected... thanks! (sorry for English ;D)