AP Cmd switch not working

Hi Folks.In FS9 I have taken the Clive Ryan C-130 panel folder and placed it into the folder of another C-130 that I liked the textures of. I have renamed the original panel folder, so that is ok.I now find that the Autopilot Master switch will not operate. When I click on it I get one flash of the switch light and the AP disconnected warning tone.I have looked at the a/c config file but cannot see anything that would make the master switch not work. I have copied in the air file from the original aircraft that the panel was in. I have confirmed the model file is named correctly. I have deleted out the complete autopilot gauge using Panel Studio and replaced it with the default 737 but the switch on that one will not operate either. I am now well and truly stuck.Do any of you guys know why this should be? I must be overlooking something or it is something that I as yet do not know about.