Hi monks, I am trying to write a simple cgi application which makes a graph using GD::graph::lines and simply displays it to the screen within the same program. I cant get my code to work (I get a server error if I dont comment out the final line  print $gb->png;. I am modifying a woking non-cgi script but I presumed the general prinicpals were the same... Can anyone help? cheers

use strict;
use CGI ':standard';
use GD::Graph::lines;
use CGI::Carp qw(fatalsToBrowser);

my $query = new CGI;

print header(),
      start_html( -title=>  "curves",
                                 -BGCOLOR=>"#ffffff");



my @data = (
           ["31768","25498", "21736", "17138", "9614", "6688", "5016",
+ "4180", "-2508", "-3762", "-5434", "-10450", "-12122", "-17138", "-2
+0482", "-20900"],
           [84.44, 68.55, 56.43, 39.71, 26.57, 15.05, 7.11, 1.93, -9.6
+1, -17.56, -22.15, -34.69, -40.96, -48.91, -63.95, -71.04]


           );


my $graph = GD::Graph::lines ->new (600,600);

$graph-> set(
             x_label => 'Temp',
             y_label => 'Amount',
             title => 'Tria graph',
             y_max_value=>100
            ) or warn $graph->error;


$graph->set (dclrs=> [qw(green red blue)]);

my $gb = $graph->plot (\@data) or die $graph->error;
print "Content-type: image/png\n\n";
binmode (STDOUT);
print $gb->png;
[download]