my kml file on my site is not updating.I have to add new Placemark.. I am doin like
this:---

point1.kml(networklink file):--

<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2"
xmlns:gx="http://www.google.com/kml/ext/2.2">
<Folder>
<name>promed netwrk link</name>
<open>1</open>
<NetworkLink>
<flyToView>1</flyToView>
<name>mapdat2.kml</name>
<Link>
<href>https://sites.../home/kml-files/mapdat2.kml</href>
<refreshMode>onInterval</refreshMode>
<refreshInterval>30</refreshInterval>
</Link>
</NetworkLink>
<NetworkLink>
<flyToView>1</flyToView>
<name>Loads load.kml</name>
<Link>
<href>https://sites..../home/kml-files/load.kml</href>
<refreshMode>onInterval</refreshMode>
<refreshInterval>30</refreshInterval>
</Link>
</NetworkLink>
</Folder>
</kml>




mapdat2.kml(original kml) :--

<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2"
xmlns:gx="http://www.google.com/kml/ext/2.2">
<NetworkLinkControl>
<minRefreshPeriod>5</minRefreshPeriod>
<maxSessionLength>-1.0</maxSessionLength>
</NetworkLinkControl>
<Document id="promed">
<name>promedmail data</name>
<description><![CDATA[infected pple]]></description>
<Style id="style1">
<IconStyle>
<Icon>
<href>http://maps.google.com/mapfiles/kml/paddle/red-circle.png</href>
</Icon>
</IconStyle>
</Style>
<Placemark>
<TimeStamp>
<when>2012-04-15</when>
</TimeStamp>
<name>Mangalore</name>
<description><![CDATA[<div dir="ltr">15 Apr 2012 Undiagnosed deaths bovine</div>]]></description>
<styleUrl>#style1</styleUrl>
<Point>
<coordinates>74.53,12.52,0.000000</coordinates>
</Point>
</Placemark></Document></xml>


load.kml(update file) :--

<?xml version="1.0" encoding="UTF-8"?>
<kml>
<NetworkLinkControl>
<minRefreshPeriod>5</minRefreshPeriod>
<maxSessionLength>-1.0</maxSessionLength>
<Update>
<targetHref>https://sites..../home/kml-files/mapdat2.kml</targetHref>
<Change>
<Document id="promed">
<Placemark>
<TimeStamp>
<when>2012-04-23</when>
</TimeStamp>
<name>Bundi</name>
<description><![CDATA[<div dir="ltr">06 Dec 2002 Food poisoning</div>]]></description>
<styleUrl>#style24</styleUrl>
<Point>
<coordinates>75.41,25.27,0.000000</coordinates>
</Point>
</Placemark>
</Document></Create></Update></NetworkLinkControl></kml>


if I am doing something wrong then plz let me know....thank you in advance