Greetings, as stated above, unfortunately the Attack Helicopter pilot seat uses the "countermeasures" command as activating autopilot instead, due to the double grips functionality on the collective. It probably needs a dedicated input specific for that aircraft. Sadly, without CMS it renders flying alone with a HOTAS extremely challenging in combat, as there's no way to reliably deploy them while evading. This is a great mod, by the way. I really do not like hand controllers (WMR ones are especially bad for this game) and it felt like a waste to being unable to use my flight gear instead. Thank you!
Just try to deploy countermeasures on the AN-94 pilot seat solely using modded controls.