[Google Maps API v3] More problems with KML layer

[SteveYoungGoogle]

I got the KML layer working by making the URL public, as suggested by
Rossko  but now I cannot get more than three markers to show. In the
example linked and shown below there are four markers but only three
are shown in the layer, why? As usual any assistance will be
gratefully received.

Here is a link to my attempt to use a KML layer
http://steveyoung.myftp.org/maps/KMLreader1.html . Although the code
is short enough to list here.

JavasScript file http://steveyoung.myftp.org/maps/kmlAustria.js

var map;
function load() {
    var latlng = new google.maps.LatLng(48,16);
    var myOptions = {
      zoom: 8,
      center: latlng,
      mapTypeId: google.maps.MapTypeId.ROADMAP
    };
    map = new google.maps.Map(document.getElementById("map"),
myOptions);
    var kLayer = new google.maps.KmlLayer('http://steveyoung.myftp.org/
maps/austria.kml');
    kLayer.setMap(map);
}

KML file http://steveyoung.myftp.org/maps/austria.kml

<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2";>
<Document>
<Placemark>
  <name>a</name>
    <Point>
      <coordinates>16.930489,47.784239</coordinates>
    </Point>
</Placemark>
<Placemark>
  <name>b</name>
    <Point>
      <coordinates>16.585914,48.009983</coordinates>
    </Point>
</Placemark>
<Placemark>
  <name>c</name>
    <Point>
      <coordinates>15.256436,48.702892</coordinates>
    </Point>
</Placemark>
<Placemark>
  <name>d</name>
    <Point>
      <coordinates>15.2564,48.7028</coordinates>
    </Point>
</Placemark>
</Document>
</kml>

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