HELP WITH TAMING MY IRN PLEASE...

[malibu2012]

HELLO I HAVE HAD MY IRN FOR THREE WEEKS NOW , THE SHOPKEEPER DAMAGED HIS WING WHEN GRABBING HIM SO HE CANT FLY , HE IS SUPPOSE TO BE 4-6 MONTHS OLD IM SAYING MALE BUT NOT SURE THE IRN IS GREY AND AS A FAINT RING . ANYWAY IVE BEEN TARGET TRAINING INSIDE HIS CAGE AND HE TAKES TREATS OFF ME THROUGH THE BARS AND FOLLOWS THE TARGET , BUT HE WONT STEP UP I GOT HIM TO STEP UP ONCE OUTSIDE THE CAGE BUT HE BIT HARD I DINT MOVE HE JUMPED OFF AFTER HAVING A GOOD CHEW. I CNT GET HIM OUT OF THE ROOM WERE HIS CAGE IS BECAUSE HE DONT STEP UP AND I DONT WANT TO TOWEL HIM. SO WHAT ELSE COULD I DO TO TAME HIM ? ALSO I HAVE A ROSELLA IN A SEPARATE CAGE IN THE SAME ROOM , WHICH HE GOES AND ATTACKS HOW CAN I STOP THIS ? AND GET HIM TO COME IF HIS CAGE STEPPING UP ONTO A HANDHELD PERCH . ALSO HE KEEPS PULLING BLOOD FEATHERS OUT ON HIS DAMAGED WING EITHER THAT OR WHEN HE JUMPS OFF THINGS AND HITS THINGS BECOS HE CANT FLY THERE COMING OUT THAT WAY. AND NOW WHEN I GO TO CAGE HE HISSES AND TRYS TO BITE ITS LIKE ONE STEP FORWARD TWO STEP BACK , COULD THIS BE JUST BECAUSE HES IN PAIN WITH HIS WING?