Hi Dean,
I will attempt a blow by blow description.
First open a new binding at song level
Next set up the source section of the binding to trigger on a song load.
Next you set up the target section to aim at the Kurweil. I used “External Synth” for my target since I don’t know the name of your MIDI port you have for your Kurweil. I also used “Program Change (Banked)” since you might be calling up programs that are from a large pool of banks and presets.
The last step is to fill in the value box in the Mapping section of the binding. My example uses “1.127” or bank 1 program 127. The period separates the bank and program numbers.
FWIW the value setting is affected by the global MIDI program formatting that Cantabile has in the Options area. I would check what formatting is set before setting up your bindings.
Hope this helps. 
Dave