Your best bet is to read the Fog user guide:
[url]http://www.fogproject.org/wiki/index.php?title=FOGUserGuide[/url]
Have to got the server set up correctly so that you can tftpd boot? Do you get the pxe menu up?

[SIZE=16px][FONT=arial][COLOR=#333333]thanks,[/COLOR][/FONT][/SIZE][SIZE=16px][FONT=arial][COLOR=#333333] [/COLOR][/FONT][/SIZE][SIZE=16px][FONT=arial][COLOR=#333333]I’m not at home[/COLOR][/FONT][/SIZE][SIZE=16px][FONT=arial][COLOR=#333333] right now but i’ll try later. :D[/COLOR][/FONT][/SIZE]

Did you define a mysql password?

You need to manually enter the password in /var/www/fog/commons/config.php