I keep failing the instrument rating lesson for cessna 182. I can not get past the holding pattern (hold on 140 radial)at SEA airport. When I come in on 160 heading from PARK intersection at 3000ft., I make a right hand turn at SEA and hold 320 in order to come back in on 140 radial. The lesson ends shortly after I make my right hand turn at SEA. What am I doing wrong?