     private var negativeNumberFormatErrorOverride:String;
 
     [Inspectable(category="Errors", defaultValue="null")]
-
+    [Bindable("change")]
     /**
      *  Error message when the input number's negative number format is not
      *  following the pattern specified by the negativeNumberFormat property.

        const len:int = input.length;
        // Check for invalid characters in input.
        // One of the negative format of number is enclosing in parenthesis.
        const validChars:String = DECIMAL_DIGITS + "-" + "(" + ")" +
            decimalSeparator + groupingSeparator;

        if (validateInputCharacters(input, len, validChars))
        {

        // See if negative number is allowed.
        if (!validateNumberNegativity(inputNum, baseField, results))
            return results;
        
        var dindex:int;
        if (negativeNumberFormat <= 2)
            dindex = input.lastIndexOf(decimalSeparator);
        else
            dindex = input.indexOf(decimalSeparator);
        
        //
        // Make sure every character after the decimal is a digit,
        // and that there aren't too many digits after the decimal point:
