Movie Clip Button Help

This is part of a large quiz I am building. The three choices here are part of a group of three from which you should only choose one. If so the other two are enabled=false.

I can’t change the method only modify since it is part of a much larger app that is runnung fine. So no radio buttons or codeing on maintimeline.

If you run the attached simple FLA and select the first choice you can see the enabled=false that is on the voted and pass framesworks fine, however if you choose the second the first is only disabled and the third is enabled and as logic would have it if you choose the third the first and second are enabled.

The idea is to make it so the user can only choose one the other two are disabled while still having the choice to deselect. I am guessing it is a scope issue but It all looks good to me … HELP!