[pstricks] pstricks-add: ! Paragraph ended before \pss at t was complete.

[Antoine Pairet]

Hi all!
The following example which is extracted from pstricks-add-doc.pdf fails
on my system and I do not understand why. 

\documentclass{article}
\usepackage{pstricks-add}
\begin{document}
	\begin{pspicture}[showgrid=true](-2,-1)(10,10)
		\psset[xAxisLabel={lol},yAxisLabel={supraLol}]
		\psgraph[ylabelFactor=\cdot 10^6,Dx=5,Dy=100](0,0)(25,750){8cm}{5cm}
		\endpsgraph
	\end{pspicture}
\end{document}

If I comment the line with the \psset{...}, I do not have an error but
the result seems strange. 

Moreover, trying the obtain this other example from the doc does not
give to an error, but the result is not what is expected.
\psaxes{->}(5,2.25)[$x$,0][$y$,90]

The log of the run is attached. What I am doing wrong?
Any help is appreciated.

Antoine
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