CursorOn, but mouse right button won't work?

I wanna cursor shows up, and mouse right click to free look also hide cursor.
released button, cursor on.
but, after cursor on, right button won't work anymore! why?

//moveMap.bind( mouse, xaxis, yaw );
//moveMap.bind( mouse, yaxis, pitch );
moveMap.bind( mouse, "button1", FreeLook);
CursorOn();

function FreeLook(%val)
{
  if (%val)
  {
    echo("pressed.......");
    moveMap.bind( mouse, xaxis, yaw );
    moveMap.bind( mouse, yaxis, pitch );
    CursorOff();
  }
  else
  {
    echo("released.....");
    moveMap.bind( mouse, xaxis, "");
    moveMap.bind( mouse, yaxis, "");
    CursorOn();
  }
}