Trying to get the mower on the bx2200. It's an Rck60b mower. I can't seem to get it lined up- the two lift arms are angled inwards towards the center of the tractor, which I don't remember they were, but maybe they were- whether the front hook-up is connected or not, I can't get the lift arm holes lined up with the pin holes. Last year, I just hooked up the front end and lowered the lift arms and they clicked into place. Not this year. HELP!