Sorry, I really have no idea. Maybe its having issues with new versions of CBA or something.
Maybe its better to ask in the CBA thread which you can find here
I hope they can help.
Only thing you should double check, are you really running CO? Maybe you did not activate both games and are in fact only running OA, or maybe only A2.
You can easily check this when you open the editor, the A2 and OA islands should be all there.