What on earth were you doing? 
Well to the point,I was heading in straight in for Runway 32L.When I checked my position on the Garmin Gps 500,I clicked on the GPS/NAV TO NAV after reaching the JOCKY marker to lock in on the ILS FEATHER.
I'M not completely sure why the plane started to divert from the approach path.The course was set correctly....323 degrees[322.8]; BTW I don't have that problem very much.
