Question

Is there any way to change Spark button label dynamically? When i click on it, i want the label to change. I bind the String to label and gives value for the first time, but even flashBuilder shows me that Data binding will not be able to detect assignments.
Here is my button:

<s:Button name="button" label="{butt}" x="5" y="3" useHandCursor="true" 
          click="start()" buttonMode="true" cornerRadius="5" 
          skinClass="skins.CustomButtom"/>

And here is assigment:

public var butt:String = "Start";

Update
Both answers work.

Answer 1

Make the variable Bindable like this:

[Bindable]  
public var butt:String = "Start";