Instanciating AcMapLayer object causes exception with FDO layers

[creid]

Hello!

This was working in Map3D 2012 (I cannot test it myself, but so I have been told...) but causes excpetion in 2013 & 2014.

Here is my snippet:

   FDOLayer[] activeLayers = fdoConnection.GetActiveLayers();
   if (activeLayers.Length > 0)
   {
      foreach (FDOLayer activeLayer in activeLayers)
      {
         if (IsLayerFileInMap(activeLayer) == false)
         {
            AddLayerFromFile(activeLayer, filterLocationWKT, filterLocationType);
         }
         else if (AcMapMap.GetCurrentMap().GetLayers().Contains(activeLayer.LayerDisplayName))
         {
            AcMapLayer mapLayer = AcMapMap.GetCurrentMap().GetLayers().GetItem(activeLayer.LayerDisplayName) as AcMapLayer;
            SetLayerGeometryFilter(mapLayer, filterLocationWKT, filterLocationType);
         }
       }
    }

So this is how my AcMapLayer object is instanciated:

AcMapLayer mapLayer = AcMapMap.GetCurrentMap().GetLayers().GetItem(activeLayer.LayerDisplayName) as AcMapLayer;

After instanciation, when I inspect my object: 

it contains 2 exceptions:

• 'mapLayer.CoordinateSystem' threw an exception of type 'OSGeo.MapGuide.MgInvalidOperationException'
• 'mapLayer.EditMode' threw an exception of type 'OSGeo.MapGuide.MgNullReferenceException'

So later in my code, when I do the following:

mapLayer.ForceRefresh();

 I get an Exception:

'Null reference. The GWS layer source is invalid'

I am lost here!

Thank you in advance!