How can work .fxml with editor and scene builder in the same instance IDEA

Hello everybody,

I try to develop with JavaFX and I want to discover and pratice fxml file both scene builder and xml editor Idea.

But When I configure .fxml for open with scene builder I don't can edit fxml in xml view

and

When I configure .fxml to open with editor xml view I don't can open it with scene builder.

Can you help me to work in fine context with editor xml and scene builder in the same instance of Intellij IDEA 12 ?

Thank for your help