apache-php installation

Hi! I have a problem when i start my apache server. It tells to me “The port number "http://localhost" is outside the appropriate range (i.e., 1..65 535).”, but I have at ServerName this : “ServerName http://localhost <http://localhost/> ”; i.e, I’ve put no port.I suppose 80 is the default port, but I don’t understand why throw this error If someone could help me…. thanks Fernando Sánchez Manzano