None of the three locos in the Chessie GP9 pack will work, the brake cylinder pressure is stuck around 60 psi. ???? Release of train and Independent does not work.
Sure, because i'm don't have a problems with specs. They should be working in Trainz 2009 and above.
Try install specs again and re-installing locomotives in session.
I get this all the time with many different locomotives. It is a bug in the airbrake scripts from the game itself. You just need to do a few sets and releases with the automatic and it will release eventually. I'm not 100% sure what causes this but it's usually when you use automatic and independent and the same time. Post back your results please!