Free Roam - Class 66

Hi guys,

im trying to couple as class 66 up to some coaches with another class 66 on the other end. The break on the loco being dragged appear stuck on, can anyone advise what I need to do?

 

Turn it off

 

On the screen above the cab window, you should be able to set the brakes to cut-out. Simply release the brakes before doing so, and it should work (if the East Coastway's 'Cutting Closure' scenario from which I got this from is still accurate).