[SOLVED] Mesh Object does not visible

Dear all,

I am new with Sofa. For my first test project, I created a .msh file with gmsh and load it with a meshloader in my .scn file. Actually, I just copy paste the large part of the liver.scn in the demos. However, the .msh object of mine is not visible. Does anybody has an idea why this is happened?

Attached my .scn file:

<?xml version="1.0" ?>
<Node name="broot" gravity="0 -9.81 0" dt="0.02">
    <DefaultPipeline name="CollisionPipeline" verbose="0" />
    <BruteForceDetection name="N2" />
    <DefaultContactManager name="collision response" response="default" />
    <DiscreteIntersection/>
	
    <Node name="blood" gravity="0 -9.81 0">
        <EulerImplicitSolver name="cg_odesolver"  />
        <CGLinearSolver name="linear solver" iterations="25" tolerance="1e-09" threshold="1e-09" />
        <MeshGmshLoader name="meshLoader" filename="D:\DynamicBrainPhantom\mesh\blood.msh" />
        <TetrahedronSetTopologyContainer name="topo" src="@meshLoader" />
        <MechanicalObject name="dofs" src="@meshLoader" />
        <TetrahedronSetGeometryAlgorithms template="Vec3d" name="GeomAlgo" />
        <DiagonalMass  name="computed using mass density" massDensity="1" />
        <TetrahedralCorotationalFEMForceField template="Vec3d" name="FEM" method="large" poissonRatio="0.3" youngModulus="3000" computeGlobalMatrix="0" />
        <FixedConstraint  name="FixedConstraint" indices="3 39 64" />
        <Node name="Visu" tags="Visual" gravity="0 -9.81 0">
            <OglModel  name="VisualModel" fileMesh="D:\DynamicBrainPhantom\mesh\blood.obj" />
            <BarycentricMapping name="visual mapping" input="@../dofs" output="@VisualModel" />
        </Node>
     </Node>
</Node>

best,
Siming