No clickable VC

For nearly a day, now, I 've been adding stuff to my VC, but MakeMDL or FS is screwing up. Everything in the cockpit actually moves like it should, but I can't move it with the mouse. When I move the mouse over the switch or lever, nothing registers. It was working fine yesterday.
Everything moves correctly, but I am unable to move it via the mouse.
If I export another aircraft as this one, things move fine and the mouse registers the parts. I can move everything with a different model in there, but nothing will move with what I've got.
I've tried going back to a previous version of the same model, which worked fine when exported before, but it still does the same thing.
I've tried deleting the last mod of the model, but no such luck.
I'm really confused, here. Does ANYONE have any ideas on this?
Everything moves correctly, but I am unable to move it via the mouse.
If I export another aircraft as this one, things move fine and the mouse registers the parts. I can move everything with a different model in there, but nothing will move with what I've got.
I've tried going back to a previous version of the same model, which worked fine when exported before, but it still does the same thing.
I've tried deleting the last mod of the model, but no such luck.
I'm really confused, here. Does ANYONE have any ideas on this?
