Sometimes when starting the server I was unable to connect to panel or localhost with browser. I discovered by accident, that if I was running SKYPE, I could not launch Uniform Server. Then with a little investigation found out why. When SKYPE is behind NAT or a firewall and starts up, it uses port 80 so it is able to connect to the P2P network. Since the port is then occupied, Apache is unable to get the socket. If I launch Uniform Server before SKYPE, then all is OK. SKYPE must then grab some other open and popular port.