Crew Chief 'Assign Control' button greyed-out...PS4

[the_greeze]

Hi All,
I'm using the Crew Chief app on my laptop with PCars 2 on PS4, works great but the 'Assign Control' button is greyed out. Does anyone know why? I really want to add a push-to-talk button but this issue is preventing me from doing that...

Any help, much appreciated.

 

[the_greeze]

It might help someone here... got a resolution from the developer over at the Crew Chief forums:

select the controller (click "scan for controllers" if this list is empty), then select the action you want to assign, then the button will be enabled - click it, then click the controller button you want to use for that action