[pmwiki-users] pmgraphviz problem: No Image on site?

[Prasad Burra]

Hi ,
can some body help me out with this problem.
I installed pmgraphviz.php
I installed on the server graphviz. Its running perfectly..I
tested..its generating the files.

and I edited the config.php and pasted the lines

$PmGraphVizCacheDir = "$FarmD/pub/pmgraphviz";
$PmGraphVizDotPgm = "/home/parisodh/bin/bin/dot";
$PmGraphVizCacheDirUrl = "$FarmPubUrl/pmgraphviz";
$PmGraphVizConvertPgm = "/usr/bin/convert";

include_once('cookbook/pmgraphviz.php');

when I pasted the following example script from pmwiki home:
(:pmgraphviz -- [=
   digraph {
      "hello" -> "world";
   }
=] :)

its not showing the image ...
where am I making mistake...
thank you .
Prasad.