[OS X TeX] pstricks help

[Johann Spies]

I am fairly new to OS X and I am struggling to get some of my old  
latex-files to compile.

Many problems were related to my usage of pstricks.  So I tried an  
example from the pstricks-manual:

\documentclass{article}
\usepackage{pstricks}
\usepackage{pst-node}  % this automatically loads pstricks
\begin{document}
\def\psedge{\nccurve[angleB=180, nodesepB=3pt]}
\pstree[treemode=R, treesep=1.5, levelsep=3.5]%
{\Toval{root}}{\Tr(X} \Tr{Y} \Tr{Z}}

\end{document}

Which fails, like many of the other with

(/usr/local/texlive/2007/texmf-dist/tex/generic/pstricks/pst-node.tex
v97 patch 11, 2000/11/09)) (./Untitled.aux)
! Undefined control sequence.
l.7 {\Toval
            {root}}{\Tr(X} \Tr{Y} \Tr{Z}}
? ?


What am I missing?

None of the files in the src-directory of pstricks compiles  
successfully.

Regards


Johann
--
J.H. Spies - Tel. 021-982 2694 / 082 782 0336 / 021-808 4036(w)
              Posbus 4668, Tygervallei 7536
          Webblad:  http://www.alterit.co.za

      "Yet if any man suffer as a Christian, let him not be
       ashamed; but let him glorify God on this behalf."
                                         I Peter 4:16




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