(DG) Auto Pilot off Alarm

[2thfish]

Since upgrading the software on my ST70 and SmartPilot X10 auto pilot I am receiving a Pilot failure alarm erratically. Sometimes it is only long enough to pop-up on the screen and other times I have acknowledge the alarm to stop it. The auto pilot seems to work fine otherwise and if I turn off the ST70 head I know longer get the messages. I ran the ST70 diagnostic and everything passed but the last test. This test shows a diagram of the ST70 buttons and the message is: "Teszt Eredmeny FAIL nyomjon MENU-t a kilepeshez" I have checked all the connections and they seem fine. What is causing this please and how do I fix it. In a little more than two weeks we plan to cross over to the Bahamas so I need to have confidence the autopilot is working properly. Thanks.