Snapping with mutiple custom tool using diffrent snapping types

I have a custom tool with snapping type is (snapping to point + snapping to edge), and the second tool having snapping type is snapping to point only, so when i select the first tool it works well, but when i switch to the second it do not work , even if when i return to the first tool, it do not work too. the same as when i start using the second tool , once i switch to the first tool the snapping stops working in all tools.

here is the code of the on click event of the first tool:

public override void OnClick()
    {


        IHookHelper2 m_hookHelper2 = m_hookHelper as IHookHelper2;
        IExtensionManager extensionManager = m_hookHelper2.ExtensionManager;
        if (extensionManager != null)
        {

            UID guid = new UIDClass();
            guid.Value = "{E07B4C52-C894-4558-B8D4-D4050018D1DA}"; //Snapping extension.
            IExtension extension = extensionManager.FindExtension(guid);
            m_SnappingEnvironment = extension as ISnappingEnvironment;

            m_SnappingEnvironment.SnappingType = (esriSnappingType)9;// esriSnappingType.esriSnappingTypePoint + esriSnappingType.esriSnappingTypeEdge;
            m_Snapper = m_SnappingEnvironment.PointSnapper;



            m_SnappingFeedback = new SnappingFeedbackClass();

            m_SnappingFeedback.Initialize(m_hookHelper.Hook, m_SnappingEnvironment, true);

            ISet excludedLayerSet = new ESRI.ArcGIS.esriSystem.SetClass();
            m_Snapper.ExcludedLayers(ref excludedLayerSet);

            for (int i = 0; i < dessin.get_instance().mapDocument.get_Map(0).LayerCount; i++)
            {
                if (dessin.get_instance().mapDocument.get_Layer(0, i).Name != "Point_t" && dessin.get_instance().mapDocument.get_Layer(0, i).Name != "Point_d" && dessin.get_instance().mapDocument.get_Layer(0, i).Name != "line_k")
                    excludedLayerSet.Add(dessin.get_instance().mapDocument.get_Layer(0, i));
            }

            m_Snapper.ClearCache();

        }

    }



 public override void OnMouseMove(int Button, int Shift, int X, int Y)
        {
            if (Button == 4)
                return;
            //Convert the point from pixels to map units.
            m_CurrentMouseCoords = QueryMapPoint(mapDocument.ActiveView.ScreenDisplay, X, Y);

            //Test the location against the snap environment.
            snapResult = m_Snapper.Snap(m_CurrentMouseCoords);

            //Update the snapping feedback.
            m_SnappingFeedback.Update(snapResult, 0);

            //Update the current location to move the cursor to the snapped location.
            if (snapResult != null)
                if (snapResult.Location != null)
                {
                m_CurrentMouseCoords = snapResult.Location;
            //MessageBox.Show("sdsd");
                }

            if (m_linefeedback != null)
            {

                m_linefeedback.MoveTo(m_CurrentMouseCoords);

            }
        }

Any help please.