Editing <label> of XBL component

I have created an XBL component which has a drop down control with its meta data read from static xml file. XBL component is attached to this mail.

It is now available as a drag and drop control in form builder tool box.

I want a default label associated with the XBL component, so I have added label as “ASA”

<fb:template>

                <my:ASA-selector>

                                <xf:label>ASA</xf:label>                                                                           

                                <xf:hint ref=""/>

                                <xf:help ref=""/>

                                <xf:alert ref=""/>

                </my:ASA-selector>

</fb:template>

Now default label is shown up in form builder when user drag and drop the control

Now if user wants to modify the label then its not possible.

The label field is editable in form builder, once we edit and save it. When we re launch the form it shows up with the default label.

How can I provide a default label as well as make it modifiable by user?

Thanks,

Vinod S