ADI II/Garmin296

Does any one out there know the proper settings on a Garmin 296 to get it to interface properly with a Trutak ADI II. I get a signal and the unit gives me the gps track. The unit will fly on wing levelor mode very well but when I try to lock onto a current track in the Nav mode the auto pilot seems lost. I am sure that I do not have the output settings on the 296 correct. Any suggestions would be welcome. Thanks you

Tom Martin
F1 EVO