[pstricks] \psxlabel and friends

[Jay Belanger]

According to the manual, the labels on the axes created by \psaxes 
can be changed by changing the definitions of \psxlabel and 
\psylabel.  That doesn't work for me, though.  A file with contents

\documentclass{article}
\usepackage{pst-all}
\begin{document}
\renewcommand{\psxlabel}[1]{{\small #1}}
\begin{pspicture}(0,0)(5,5)
\psaxes(0,0)(5,5)
\end{pspicture}

when LaTeXed, gives me the error

! LaTeX Error: \psxlabel undefined.

and a file with contents

\documentclass{article}
\usepackage{pst-all}
\begin{document}
\def\psxlabel#1{\small #1}
\begin{pspicture}(0,0)(5,5)
\psaxes(0,0)(5,5)
\end{pspicture}
\end{document}

doesn't change the size of the labels.
Am I doing something wrong, or is there another way of changing the
labels?
(I've been using labels=none and then putting them in myself, so to
speak, an unsatisfactory solution, I think.)

Jay