JavaScript Server Side event issue

Question

My server-side event is not calling the jplayers function at all. It only displays that I have the one JavaScript error below but continues to execute start.php but the events never get called. The number1 does get logged. This error appears but cant tell whats wrong:

Firefox can't establish a connection to the server at ...

var source = new EventSource('start.php');
var plr;
source.addEventListener("player", jplayers, false);
source.addEventListener("nplayer", nplayers, false);

function nplayers(e) {
    alert(e.data);
    var pingev = document.getElementById("nplayers");
    pingev.innerHTML = e.data;
    plr = e.data;
}
function jplayers(e){
    alert(e.data);
    var pingev = document.getElementById("jplayers");
    pingev.innerHTML = e.data;
    plr = e.data;
}

$result = $dbconn->query($query);
$number1 = mysqli_num_rows($result);
logMsg($number1);
echo "event: player\n";
echo 'data: ' .$number1. '';
echo "\n\n";