Force Trim Release (FTR) not working

'I was hoping you could help. I assign the FTR in Xplane12 to one of my cyclic buttons and it doesn't seem to do anything. The button is registering when I press it (in Xplane settings), I assign FTR to it but when I press-and-hold it the cyclic continues to move so I cannot re-center my controls. I'm currently using the HeliTrim plugin but would rather use your native FTR if possible.

You probably have the autopilot on? Then FTR works differently. Look here .