FASA Apollo CM CSM Decoupler Error with stock docking collar.

[grant977]

When I choose undock when using the stock docking collar the CSM/cm apollo Decoupler fires but in an erroneous way to where the thing sometimes exploads, and or just sits there. But whatever happens once I go back to space center the game does not allow me to do anything I have to delete the save file from the kerbal folder and replace it with my backup.