Vista - cannot set a TemplateBinding to my TranslateTransform

Hi,

i have a custom usercontrol. in the custom user control, i have defined two
dependency properties.

For example:

// Set the Value for the TransformTranslation X
public double TraX
{
get { return (double)GetValue(TraXProperty); }
set { SetValue(TraXProperty, value); }
}

// Using a DependencyProperty as the backing store for TraX. This
enables animation, styling, binding, etc...
public static readonly DependencyProperty TraXProperty =
DependencyProperty.Register("TraX", typeof(double),
typeof(ZisCircleToggleButtonControl), new UIPropertyMetadata(8.0));


//// Set the Value for the TransformTranslation Y
public double TraY
{
get { return (double)GetValue(TraYProperty); }
set { SetValue(TraYProperty, value); }
}

// Using a DependencyProperty as the backing store for TraY. This
enables animation, styling, binding, etc...
public static readonly DependencyProperty TraYProperty =
DependencyProperty.Register("TraY", typeof(double),
typeof(ZisCircleToggleButtonControl), new UIPropertyMetadata(8.0));

OK, for my custom control i have defined a style. inside the style i will
set the TranslateTransform for my control. For example:

<Setter Property="RenderTransform">
<Setter.Value>
<TranslateTransform X="{TemplateBinding TraX}" Y="{TemplateBinding
TraY}"/>
</Setter.Value>
</Setter>

when i compile this, i become the error message: Error 28 'TraX' member is
not valid because it does not have a qualifying type name.

whats the problem? i can bind the width to a custom dependency propertie or
what i want.

can someone help me?

thanks