A canvas control is frozen

Working with Visual Studio 2015, WPF I have a Canvas control which serves as a canvas to draw a skeleton that I get by scanning through the Kinect device when I get in front of the device my skeleton that appears on the canvas freezes.

I tried using async / await using task to prevent it from freezing, this is the code I occupy.

//skeletonCanvas.Children.Clear();
        await Task.Run(() => skeletonCanvas.Children.Clear());
//skeletonCanvas.Children.Add(jointLine);
                    await Task.Run(() => skeletonCanvas.Children.Add(jointLine));

Code of the entire event

private async void KSensorSkeletonFrameReady(object sender, SkeletonFrameReadyEventArgs e)
    {
        string manoDerecha = string.Empty;
        string manoIzquierda = string.Empty;
        Skeleton[] skeletons;
        using (var frame = e.OpenSkeletonFrame())
        {
            if (frame == null) return;
            skeletons = new Skeleton[frame.SkeletonArrayLength];
            frame.CopySkeletonDataTo(skeletons);
        }

        int iSkeleton = 0;
        var brushes = new Brush[6];
        brushes[0] = new SolidColorBrush(Color.FromRgb(255, 0, 0));
        brushes[1] = new SolidColorBrush(Color.FromRgb(0, 255, 0));
        brushes[2] = new SolidColorBrush(Color.FromRgb(64, 255, 255));
        brushes[3] = new SolidColorBrush(Color.FromRgb(255, 255, 64));
        brushes[4] = new SolidColorBrush(Color.FromRgb(255, 64, 255));
        brushes[5] = new SolidColorBrush(Color.FromRgb(128, 128, 255));

        //skeletonCanvas.Children.Clear();
        await Task.Run(() => skeletonCanvas.Children.Clear());
        foreach (var data in skeletons)
        {
            if (SkeletonTrackingState.Tracked == data.TrackingState)
            {
                Joint jointManoDerecha = data.Joints[JointType.HandRight];
                Joint jointManoIzquierda = data.Joints[JointType.HandLeft];

                SkeletonPoint posicionManoDerecha = jointManoDerecha.Position;
                SkeletonPoint posicionManoIzquierda = jointManoIzquierda.Position;

                manoDerecha = string.Format("Mano derecha: X:{0:0.0} Y:{1:0.0} Z{2:0.0}", posicionManoDerecha.X, posicionManoDerecha.Y, 
                    posicionManoDerecha.Z);

                manoIzquierda = string.Format("Mano izquierda: X:{0:0.0} Y:{1:0.0} Z{2:0.0}", posicionManoIzquierda.X, posicionManoIzquierda.Y,
                    posicionManoIzquierda.Z);

                // Dibujar huesos
                Brush brush = brushes[iSkeleton % brushes.Length];
                skeletonCanvas.Children.Add(GetBodySegment(data.Joints, brush, JointType.HipCenter, JointType.Spine, JointType.ShoulderCenter, JointType.Head));
                skeletonCanvas.Children.Add(GetBodySegment(data.Joints, brush, JointType.ShoulderCenter, JointType.ShoulderLeft, JointType.ElbowLeft, JointType.WristLeft, JointType.HandLeft));
                skeletonCanvas.Children.Add(GetBodySegment(data.Joints, brush, JointType.ShoulderCenter, JointType.ShoulderRight, JointType.ElbowRight, JointType.WristRight, JointType.HandRight));
                skeletonCanvas.Children.Add(GetBodySegment(data.Joints, brush, JointType.HipCenter, JointType.HipLeft, JointType.KneeLeft, JointType.AnkleLeft, JointType.FootLeft));
                skeletonCanvas.Children.Add(GetBodySegment(data.Joints, brush, JointType.HipCenter, JointType.HipRight, JointType.KneeRight, JointType.AnkleRight, JointType.FootRight));

                // Dibujar articulaciones
                foreach (Joint joint in data.Joints)
                {
                    Point jointPos = GetDisplayPosition(joint);
                    var jointLine = new Line();
                    jointLine.X1 = jointPos.X - 3;
                    jointLine.X2 = jointLine.X1 + 6;
                    jointLine.Y1 = jointLine.Y2 = jointPos.Y;
                    jointLine.Stroke = _jointColors[joint.JointType];
                    jointLine.StrokeThickness = 6;
                    //skeletonCanvas.Children.Add(jointLine);
                    await Task.Run(() => skeletonCanvas.Children.Add(jointLine));
                }
            }

            iSkeleton++;
        } // para cada esqueleto
        lblManoDerecha.Content = manoDerecha;
        lblManoIzquierda.Content = manoIzquierda;
    }

The error he gives me is this:

  

The subprocess making the call can not access this   object because the owner is another subprocess.