Mapping a button to arturia spring plugin

Hi, I d like that one of my button can be use to kick the tank of the arturia spring reverb,
The plugin is on a return track, I mapped it as the 9 control of the plugin, configured it as the 9 control in the plugin but this doesn’t work, I have pots set to the 8 first control they work fine, if I put this kick control on the first number of the list I can kick it with the first pot but impossible with a button, I tried with on/off setting, relative, absolute, can t ding why this won t work, any idea?
Thanks