First of all I would like to thank PMDG for the perfect 737NGX package.But Im experiencing some problems with the 600/700. When i load the aircraft it keeps asking me to activate it every time, and when Im in the airport and load the cold and dark state, nothing happens and nothing works, battery switch, std by power selector and the aircraft doesn't respond to any command!Any ideas or suggestions?the 800/900 are working perfectly