error message in contour elevation label

I'm receiving this message prompt when using "Contour Elevation Label" in
Carlson Survey 2006.
also being received when using the "Draw 3D Grid File".
C:\PROGRAM FILES\CARLSON SOFTWARE 2006\LSP\CONTOUR4.ARX cannot find a dll or
other file that it needs.
Unable to load C:\PROGRAM FILES\CARLSON SOFTWARE 2006\LSP\CONTOUR4.ARX
no function definition: CF:GCLABEL :error#93
--
Tim Marshall
Carlson Survey 2006.
also being received when using the "Draw 3D Grid File".
C:\PROGRAM FILES\CARLSON SOFTWARE 2006\LSP\CONTOUR4.ARX cannot find a dll or
other file that it needs.
Unable to load C:\PROGRAM FILES\CARLSON SOFTWARE 2006\LSP\CONTOUR4.ARX
no function definition: CF:GCLABEL :error#93
--
Tim Marshall