Centreon first steps

[Stunty]

Hi, everyone.
I'm new here and i would like to have a very good tutoriel which shows how to add an host with centreon 2.0-b3. Wher should i go to add an host and get graph?
I think I added a host but I cant get any graph... But when i am on the home page, i don't see any host :/
When I restart Nagios I get this :

Warning: fwrite(): supplied argument is not a valid stream resource in /usr/local/centreon/www/include/configuration/configGenerate/DB-Func.php on line 685

[Stunty]

I found a new problem :

Can't write in directory
/etc/snmp/centreon_traps/

Can't execute binary
/usr/sbin/snmpttconvertmib

When i try to change my SNMP version from SNMP v2 to v2c

[falc410]

Ater adding a host you will have to restart nagios and write & move the configuration files in order for the host to show up under monitoring.

You should first get familiar with Nagios before using Centreon imho.