Imagemaps always empty

[Stéphane RIFF]

Hi

I tried to make imagemap support to work with no success.

I have a mapfile create with phpmapscript. there is one point layer,
this mapfile draws fine so i can see my symbols in a png image.

Now i take the same mapfile with :
IMAGETYPE imagemap

OUTPUTFORMAT
    NAME imagemap
     DRIVER imagemap
     FORMATOPTION "POLYHREF=#"
     FORMATOPTION "SYMBOLHREF=#"
     FORMATOPTION "SUPPRESS=YES"
     FORMATOPTION "MAPNAME=map_test"
     FORMATOPTION "POLYMOUSEOUT=alert('poly out');"
     FORMATOPTION "POLYMOUSEOVER=alert('poly  %s');"
         FORMATOPTION "SYMBOLMOUSEOUT=alert('symbol out');"
     FORMATOPTION "SYMBOLMOUSEOVER=alert('symbol %s');"
     MIMETYPE "text/html"
  END

With phpmapscript i do that :
 $imagemap =
ms_newMapObj("/var/www/html/map/imagemap.map","/var/www/html/map/");
 $htmlmap = $imagemap->draw();
 $htmlmap->saveImage("/var/tmp/test.html", $imagemap);

Here comes the problem : there is no error and tha imagemap file is
write well but i always get this in "/var/tmp/test.html":
<map name="map_test" width="600" height="600">
</map>

I use mapserver 4.4.2 , postgis , phpmapscript on redhat box.

Every advice are welcome
Thanks