I bought a used Big Tiller arm and installed it on a 2008 Optimax 150. The trim button on the side of the motor works like it should, but the trim button on the end of the tiller arm does nothing. Any ideas of what could be causing this not to work? I plan on pulling the bottom plate off of the arm and check for the obvious, loose wire, bad switch, etc but thought I'd throw it out here first incase someone has ran into this problem before. Thanks