OnValueChanged not fires for property

Hi,

I have a customFactory like in example. My customPropertyDataAccessor class overrides OnValueChanged() to set visibility during runtime(like in Selective Visibility example). Here is customPropertyDataAccessor class:

 private bool _isVisible;
        
 private void UpdateIsVisible()
 {
     var propertyVisibility = Target as IPropertyVisibility;
     IsVisible = propertyVisibility == null || propertyVisibility.GetPropertyVisibility(ValueName);
 }

 public bool IsVisible
 {
     get { return _isVisible; }
     private set
     {
         if (_isVisible == value) return;
             _isVisible = value;
             OnPropertyChanged("IsVisible");
     }
 }

 public override void OnValueChanged()
 {
     base.OnValueChanged();
     UpdateIsVisible();
 }

And here are two properties in my viewModel:

 public bool Offline
 {
     get { return UserControl1 != null && UserControl1.Offline; }
     set
     {
         if (UserControl1 == null) return;
         UserControl1.Offline = value;
         RaisePropertyChanged();
 	 // Force visibility to be updated
         RaisePropertyChanged("OfflineId");
     }
 }

 public int OfflineId
 {
     get { return UserControl1 != null ? UserControl1.OfflineId : 0; }
     set
     {
         if (UserControl1 == null) return;
         UserControl1.OfflineId = value;
         RaisePropertyChanged();
     }
 }

  I am using BuiltinEditors.CheckBoxValueTemplateKey in my customFactory for the property Offline and BuiltinEditors.DynamicStringValueTemplateKey for the property OfflineId.

Style for visibility:

<Style TargetType="{x:Type propgrid:PropertyGridDataAccessorItem}">
    <Style.Triggers>  
        <Trigger Property="DataAccessorType" Value="Property">
            <Setter Property="Visibility" Value="{Binding RelativeSource={RelativeSource Self}, Path=DataContext.IsVisible, Converter={StaticResource BooleanToVisibilityConverter}}" />
        </Trigger>
    </Style.Triggers>
</Style>

 My goal is to make OfflineId visible only when Offline is true. But when I change Offline's state, overriden OnValueChanged() fires only for the property Offline, and not fires for the OfflineId.

Any ideas what I have done wrong?