ps.map icon troubles

Grassusers:

I am having trouble getting icons out of a ps.map script. The icons that
appear seem to be default large diamonds, regardless of the icon file that
I name. Here is my script:

rast meantemp48.corr.ann
scale 11 inches
vector states100
  color black
  width 1
  end
sites nationstations48
  color gray
  icon cac
  size 1
  desc n
  end
comments meantemp.comments
  where 1 .5
  font Helvetica-BoldOblique
  fontsize 20
  color black
  end
psfile /usr/user9/imp/imp48.ps
end

cac can contain any icon that I draw using ps.icons, but all I ever get is
large diamonds.

What am I doing wrong?

                        Bill H.
--------------------------------------------------------------------------------
William W. Hargrove GIS and Computer Modeling Group
Oak Ridge National Laboratory Bldg. 4500N, Room 125-S, M.S. 6274
P.O. Box 2008, M.S. 6274 (423) 241-2748
Oak Ridge, TN 37831-6274 (423) 574-4634 (fax)
hnw@mtqgrass.esd.ornl.gov http://www.esd.ornl.gov/~hnw
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