I recently installed Plesk 7.5.2 in a system running CentOS 3.4. The problem is that when I try to create a new domain or setup a domain host, the server just hang out and I don't have access through SSH. I have to perform manual reboot to the server. After the reboot, I can see the user created but not the physical domain host. The system crashes again when I try to setup the domain host then. Any idea of what's causing this behavior?