UI Element CheckBox: Binding Error?!

Hi folks,

I want to translate the caption of one CheckBox item to different languages. So I have created a binding for text element to an context attribute of type string. The context attribute should be filled by using a specific assistance class later.

The problem is, that the default value, maintained for the context attribute, is not displayed on the web dynpro. The CheckBox item only displays a 'X'.

Does anyone know, what is wrong?