The CT225 is too small of tractor to run a baler, both in weight and HP. You have to remember, square balers are made to go on larger heavier tractors. Not only for the hP but because of the momentum that the flywheel produces. It will "push" a small tractor. Also if you're on a hill, that heavier baler can/will push you down. Only in todays world are people trying to run balers w/ compact tractors. Some arre really pushing the envelope. Just because you think it might have the HP, doesn't mean it will handle. Kind of like trying to killl a moose w/ a .22. Not enough gunpower there. It wasn't desingned to do so, just like a baler wasn't designed to run behind a 2000-3000 lb. tractor w/ low hp. In your case, it is both the power and weight.
Like someone said, an engine powered baler might be more conducive, no ptp power required and no centrifugal force to push the tractor. If you're in the IN,IL,OH area, I know someone who has a NH w/ a Wisconsin engine for sale.