locking iris

          Hello,
            I need help locking in my iris . When I run d.mon and
          trey to select the iris, I get,
          'Error- could not complete locking proccess for monitor
          <iris>. Lock file is
          /disk3/GRASS/grass4.0/locks/pc01/:0/iris
          Problem selecting iris will try once more.

           Any suggestions?
                                                 Tom Meitzler