arcgis 10.0 - How to add individual layer of WMS group layer to ArcMap?

I am attempting to add a single WMS layer that is part of a WMS service group layer. I am writing code to do this using ArcObjects in C# .Net. So far I have been unsuccessful. I can either only add the whole group layer, or I can add the individual WMS sub-layer but the full group is also still added.

Here is the code I have tried. I have allowed the user to select a layer from a list, and this code is trying to only add that selected layer.

    IWMSGroupLayer wmsMapLayer = new WMSMapLayerClass();
    IWMSConnectionName connName = new WMSConnectionNameClass();

    IPropertySet propSet = new PropertySetClass();
    propSet.SetProperty("URL", "http://www.___________________?");


    connName.ConnectionProperties = propSet;

    IDataLayer dataLayer = (IDataLayer)wmsMapLayer;
    dataLayer.Connect((IName)connName);

    IWMSServiceDescription serviceDesc = wmsMapLayer.WMSServiceDescription;
    IWMSLayerDescription groupDesc = serviceDesc.LayerDescription[0];

    for (int i = 0; i < groupDesc.LayerDescriptionCount - 1; i++)

    {
        IWMSLayerDescription layerDesc = groupDesc.LayerDescription[i];

        if (layerDesc.Title == lstWMSLayers.SelectedItem.ToString())//Checking if this is the selected layer
        {
            ILayer newLayer;
            IWMSLayer newWMSLayer = wmsMapLayer.CreateWMSLayer(layerDesc);
            newLayer = (ILayer)newWMSLayer;
            wmsMapLayer.InsertLayer(newLayer, 0);


            IMxDocument mxDoc = (IMxDocument)ArcMap.Application.Document;
            mxDoc.FocusMap.AddLayer((ILayer)wmsMapLayer);
            IActiveView activeView = (IActiveView)mxDoc.FocusMap;
            activeView.Refresh();
        }
    }

In ArcMap I get the following tree of layers

• WMS Service Group Layer
  
  
  
  
  • Selected WMS Layer
  
  
  • WMS Group Layer
    
    
    
    • All the layers that are part of the service...
    
    
    
    
  
  
  
  

Any suggestions?