Seymour Cash

Hello! I'm trying to use my old Hammond XK-3 to input MIDI into Logic Pro X. Logic is behaving as if Sustain (CC #64?) data is coming from the controller when there is no sustain being applied and the behavior is not evident through the audio outputs of the Hammond. I've searched Logic Help and cannot find an option to either filter incoming CC data or (hopefully) reverse the polarity of the incoming CC data, as I'm assuming the latter is the issue. Neither of these options is available from my controller. Any help is greatly appreciated. Cheers!