Been away from XP11 for a few weeks, got on and updated to 11.30r2 and jumped in the TBM900 and put everything into my flight plan, took off, set AP and hit the Nav button and the light will turn on for a split second then go off and will not engage. The AP trims switch overhead is on and the Alt and Hdg work in AP just not Nav. Is this a new bug or am I missing something?