Hi, i am trying to optimize my mesh with this code, but i don´t know why i have an access violation exception whe i call mesh.GenerateAdjacency,

i don´t know if this error is because the flags used creating the mesh or the flags creating my device or i don´t know, Anyone could guide me?

SlimDX.Direct3D9.Direct3D myDirect3D= new SlimDX.Direct3D9.Direct3D();
            SlimDX.Direct3D9.PresentParameters myPresentParamters= new SlimDX.Direct3D9.PresentParameters();
            myPresentParamters.Windowed=true;
            myPresentParamters.SwapEffect=SlimDX.Direct3D9.SwapEffect.Discard;
            SlimDX.Direct3D9.Device myDevice= new SlimDX.Direct3D9.Device(myDirect3D,0,SlimDX.Direct3D9.DeviceType.Hardware,this.Handle,SlimDX.Direct3D9.CreateFlags.SoftwareVertexProcessing,myPresentParamters);
            
            int faceCount=triangleList.Count;
            int vertexCount=vertexList.Count;
            SlimDX.Direct3D9.Mesh myMesh = new SlimDX.Direct3D9.Mesh(myDevice, faceCount, vertexCount, SlimDX.Direct3D9.MeshFlags.SystemMemory, SlimDX.Direct3D9.VertexFormat.Position);

            SlimDX.DataStream indexBuffer = myMesh.LockIndexBuffer(SlimDX.Direct3D9.LockFlags.None);
            SlimDX.DataStream vertexBuffer = myMesh.LockVertexBuffer(SlimDX.Direct3D9.LockFlags.None);

            for (int i = 0; i < myMesh.VertexCount; i++)
            {
                vertexBuffer.Write<SlimDX.Vector3>(vertexList);
               
            }


            for (int i = 0; i < myMesh.FaceCount; i++)
            {
                ushort index;
                index = (ushort)triangleList.X;
                indexBuffer.Write<ushort>(index);

                index = (ushort)triangleList.Y;
                indexBuffer.Write<ushort>(index);

                index = (ushort)triangleList.Z;
                indexBuffer.Write<ushort>(index);
            }

            
            myMesh.GenerateAdjacency(0.5f);
            SlimDX.Direct3D9.Mesh meshOptimizada = myMesh.Optimize(SlimDX.Direct3D9.MeshOptimizeFlags.StripReorder);