Shape penetrated by hkpCharacterProxy

I load a mesh and convert it to hkpMoppBvTreeShape(no simplify).

code as follow:

hkpSimpleMeshShape* storageMeshShape = new hkpSimpleMeshShape( 0.01f );

......build the storageMeshShape(abbreviation)

hkpMoppCompilerInput mci;
 {
  mci.m_cachePrimitiveExtents  = true;
  mci.m_enableChunkSubdivision = true;
 }

 hkpMoppCode* moppCode = hkpMoppUtility::buildCode(storageMeshShape, mci);

 hkpMoppBvTreeShape* moppBvTreeShape = new hkpMoppBvTreeShape(storageMeshShape, moppCode);

and create static rigidbody

hkpRigidBodyCinfo bodyinfo;
bodyinfo.m_restitution=0.0f;
bodyinfo.m_allowedPenetrationDepth=0.001f;
bodyinfo.m_collisionFilterInfo=hkpGroupFilter::calcFilterInfo(g_iHavokLayerStatic);

But in game,my hkpCharacterProxy can penetrate it in same position.

Is it because of concave faces in mesh?