CAT 232b Aux Hyd Continous Flow

I bought a CAT 232b at an auction and cannot figure out how to make a log splitter attachment work without using the thumb wheel. I've tried pushing the button on the left joystick while rolling the wheel to the up position and continous flow will not work. Checked fuses and power at button all seems fine. Splitter works great from inside the cab but I really would like to use the lever on the splitter outside the cab so it would be a one man job. Any ideas whats wrong?

Hold the roller up/down and press and hold one of the buttons on the left joystick and slowly release the roller. If that doesn't work, you might need a bypass switch as hydraulics won't work unless you are in the cab, you could try putting an 80 pound brick on the seat with the seat bar down and front door closed.