Nagios + centreon CONFIG ERROR

Hello,

I have installed nagio3 and Centreon on Debian Lenny. When I configure some hosts (or services) and then when go to Configuration - nagios - export i have problem with this:

Nagios 3.0.6
Copyright © 1999-2008 Ethan Galstad (nagios.org)
Last Modified: 12-01-2008
License: GPL

Reading configuration data…

Running pre-flight check on configuration data…

Checking services…
Checked 5 services.
Checking hosts…
Checked 2 hosts.
Checking host groups…
Checked 2 host groups.
Checking service groups…
Checked 0 service groups.
Checking contacts…
Checked 3 contacts.
Checking contact groups…
Checked 3 contact groups.
Checking service escalations…
Checked 0 service escalations.
Checking service dependencies…
Checked 0 service dependencies.
Checking host escalations…
Checked 0 host escalations.
Checking host dependencies…
Checked 0 host dependencies.
Checking commands…
Checked 54 commands.
Checking time periods…
Checked 5 time periods.
Checking for circular paths between hosts…
Checking for circular host and service dependencies…
Checking global event handlers…
Checking obsessive compulsive processor commands…
Checking misc settings…

Total Warnings: 0
Total Errors: 0

Things look okay - No serious problems were detected during the pre-flight check

Centreon : All configuration files copied with success.

Running configuration check… CONFIG ERROR! Restart aborted. Check your Nagios configuration.

anny ideas?
thank you!