[QUESTION] D3D problems :D

void render_frame(void)
{											//D3DCOLOR_XRGB(r, g, b)
    // clear the window to a deep blue		D3DCOLOR_ARGB(136, r, g, b);
    d3ddev->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0, 0, 0), 1.0f, 0);

    d3ddev->BeginScene();    // begins the 3D scene

            // select which vertex format we are using
        d3ddev->SetFVF(CUSTOMFVF);

         // SET UP THE PIPELINE

    D3DXMATRIX matRotateY;    // a matrix to store the rotation information

    static float index = 0.0f; index+=0.05f;    // an ever-increasing float value

    // build a matrix to rotate the model based on the increasing float value
    D3DXMatrixRotationY(&matRotateY, index);

    // tell Direct3D about our matrix
    d3ddev->SetTransform(D3DTS_WORLD, &matRotateY);

    D3DXMATRIX matView;    // the view transform matrix

    D3DXMatrixLookAtLH(&matView,
                       &D3DXVECTOR3 (0.0f, 0.0f, 10.0f),    // the camera position
                       &D3DXVECTOR3 (0.0f, 0.0f, 0.0f),    // the look-at position
                       &D3DXVECTOR3 (0.0f, 1.0f, 0.0f));    // the up direction

    d3ddev->SetTransform(D3DTS_VIEW, &matView);    // set the view transform to matView

    D3DXMATRIX matProjection;     // the projection transform matrix

    D3DXMatrixPerspectiveFovLH(&matProjection,
                               D3***oRadian(45),    // the horizontal field of view
                               (FLOAT)SCREEN_WIDTH / (FLOAT)SCREEN_HEIGHT, // aspect ratio
                               1.0f,    // the near view-plane
                               100.0f);    // the far view-plane

    d3ddev->SetTransform(D3DTS_PROJECTION, &matProjection);    // set the projection

   
       d3ddev->SetStreamSource(0, v_buffer, 0, sizeof(CUSTOMVERTEX) ); //Drawing my 1st triangle here

		
        // copy the vertex buffer to the back buffer  
        d3ddev->DrawPrimitive(D3DPT_TRIANGLELIST, 0, 1);                     //Drawing my 1st triangle here


				
    
d3ddev->SetStreamSource(0, v_buffer1, 0, sizeof(CUSTOMVERTEX1));     //Drawing my 2nd triangle here
 d3ddev->DrawPrimitive(D3DPT_TRIANGLELIST, 0, 1);                           //Drawing my 2nd triangle here

    d3ddev->EndScene();    // ends the 3D scene

    d3ddev->Present(NULL, NULL, NULL, NULL);   // displays the created frame on the screen
}