reboot failed

[calete]

Hi: I have plesk 8 on fedora core 4. When I try to reboot the server either using plesk button to reboot or by shell (/sbin/shutdown -r now) the system halt in a strange state but doesn't reboot, mail stil working, http is down, i don't know other services state. When I see the logs i see the message "No more process in this run level". I have tryied with "init 6" but I get the same situation.

Thank you