I have TWR-MCF51CN board and I have problem with bootloader mode in it. When I want to update my firmware by P&E firmware updater I have to use jumper on J16. When I've done it my device become undetected. When I use CodeWarrior v10.6.4 it also makes update of my firmware and it's the same problem. It happens when I reconnect my board with jumper on. Without jumper on J16 my device is detected. I'm using Mini USB cable as debugger.