Give it time. Our B&G Macaw refuses to step up on anything unless he's 'made' to. We have a dowel rod that we put under him and have him step up that way. We've had him since January. He's come a long way from where he was in just 9 months. He's also 11 years old. He spent most of his life before us on his cage. It will take time.
The only time we put our hands over both wings to pick up is to get him out of the tub. I would say to work slowly with him daily and reward him when he comes to you. Eventually he will get the idea.
Our macaw prefers my boyfriend to me. So far (We've only had peanut for 2 days) but he prefers me. *YAY!* lol!
Good luck!! ENPM