If I use glDrawRangeEXT without the NVidia glVertexArrayRangeNV and with ColorArray, it runs perfectly. If I enable glVertexArrayRangeNV and disable ColorArray it runs also perfectly. But I´ve got a blank screen, if I use the ColorArray with the NVidia extension. I wonder, because it´s the same ColorBuffer. Here I enable the states:

      case 3: // glDrawRangeArraysEXT
        glEnableClientState( GL_VERTEX_ARRAY );
        glEnableClientState( GL_COLOR_ARRAY );
        glDisableClientState( GL_VERTEX_ARRAY_RANGE_NV );

        glVertexPointer( 3, GL_FLOAT, 0, &vBuf[0] );
        glColorPointer( 3, GL_FLOAT, 0, &colBuf[0] );

        break;

      case 4: // glVertexArrayRangeNV
        // This part didn´t run

        glEnableClientState( GL_VERTEX_ARRAY_RANGE_NV );
        glEnableClientState( GL_VERTEX_ARRAY );
        glEnableClientState( GL_COLOR_ARRAY );

        glVertexPointer( 3, GL_FLOAT, 0, &NV_Buffer[0] );
        glColorPointer( 3, GL_FLOAT, 0, &colBuf[0] );

        break;

      case 5: // glVertexArrayRangeNV without ColorArray

        glEnableClientState( GL_VERTEX_ARRAY_RANGE_NV );
        glEnableClientState( GL_VERTEX_ARRAY );        
        glDisableClientState( GL_COLOR_ARRAY );

        glVertexPointer( 3, GL_FLOAT, 0, &NV_Buffer[0] );
        glIndexPointer( GL_UNSIGNED_INT, 10404, &iIndex[0] );

        break; 

I render it always with this code:

glDrawRangeElementsEXT( GL_QUADS, 0, 10404, 10404, GL_UNSIGNED_SHORT, &iIndex[0] ); 

Does anyone knows this problem? I hope you can help me. Thanks a lot p.s. Sorry about my bad english