mod_fcgid: stderr: PHP Warning: imagecreatefrompng(): php_network_getaddresses: geta

Hi,

I'm trying to install a Drupal multisite based on an existing and working website. I followed that tutorial to create a first site: http://drupalfr.org/node/6171
The drupal works fine until it executes a module that calls imagecreatefrompng. then we get :
"mod_fcgid: stderr: PHP Warning: imagecreatefrompng(): php_network_getaddresses: getaddrinfo failed: Name or service not known"

The server is installed under Debian6 / ispconfig3. Here is the virualhost automaticaly created by ispconfig:
# cat /etc/apache2/sites-enabled/ligamen.fr.vhost
<Directory /var/www/ligamen.fr>
AllowOverride None
Order Deny,Allow
Deny from all
</Directory>

<VirtualHost *:80>
DocumentRoot /var/www/ligamen.fr/web

ServerName ligamen.fr
ServerAlias www.ligamen.fr
ServerAdmin [email protected]

ErrorLog /var/log/ispconfig/httpd/ligamen.fr/error.log

<Directory /var/www/ligamen.fr/web>
Options FollowSymLinks
AllowOverride All
Order allow,deny
Allow from all
</Directory>
<Directory /var/www/clients/client1/web6/web>
Options FollowSymLinks
AllowOverride All
Order allow,deny
Allow from all
</Directory>


<FilesMatch "\.ph(p3?|tml)$">
SetHandler None
</FilesMatch>
<IfModule mod_fcgid.c>

IdleTimeout 3600

ProcessLifeTime 7200
DefaultMinClassProcessCount 0
DefaultMaxClassProcessCount 100

IPCConnectTimeout 8
IPCCommTimeout 360

BusyTimeout 300

</IfModule>
<Directory /var/www/ligamen.fr/web>
AddHandler fcgid-script .php .php3 .php4 .php5
FCGIWrapper /var/www/php-fcgi-scripts/web6/.php-fcgi-starter .php
Options +ExecCGI
AllowOverride All
Order allow,deny
Allow from all
</Directory>
<Directory /var/www/clients/client1/web6/web>
AddHandler fcgid-script .php .php3 .php4 .php5
FCGIWrapper /var/www/php-fcgi-scripts/web6/.php-fcgi-starter .php
Options +ExecCGI
AllowOverride All
Order allow,deny
Allow from all
</Directory>

<IfModule mpm_itk_module>
AssignUserId web6 client1
</IfModule>

<IfModule mod_dav_fs.c>
</IfModule>


</VirtualHost>

Thanks a lot for your ideas.

 

Seems to be some kind of resolving problem. What's in /etc/hosts?