[l2h] \htmlimage problem

[Christian]

Hi list,

when I use the following (finaltexsis01 is a png):
----------
\begin{htmlonly}
\begin{figure}
\htmlimage{thumbnail=0.5}
\centering
\includegraphics[keepaspectratio,width=10cm]{finaltexsis01}		
\end{figure}
\end{htmlonly}
----------

I always get the error:
----------
*** processing 1 images ***

Generating postscript images using dvips ...
This is dvips(k) 5.97 Copyright 2008 Radical Eye Software (www.radicaleye.com 
)
' TeX output 2009.02.18:0652' -> /tmp/l2h64527/image
(-> /tmp/l2h64527/image001)
</usr/local/texlive/2008/texmf/dvips/base/tex.pro>
</usr/local/texlive/2008/texmf/dvips/base/special.pro>
</usr/local/texlive/2008/texmf/dvips/base/color.pro>[1]
Converting image #1
pstoimg: Error: "/sw/bin/pnmcrop -verbose  < /tmp/l2h64527/p64546.pnm  
| /sw/bin/ppmquant -floyd 256 | /sw/bin/pnmtopng -interlace -trans  
'gray85'  > img1.png" failed: Invalid argument

Error while converting image: No such file or directory
----------


Is there a way to fix this and get a linked thumbnail?

Thanks
Christian