May be it's because of unclosed placemark tag in the kml file which you had written. So close the placemark tag after point tag closing.
<kml xmlns="http://www.opengis.net/kml/2.2"xmlns:gx="http://www.google.com/kml/ext/2.2">
<Document id="feat_1">
<Placemark id="feat_2">
<name>DSC00001.JPG</name>
<description><img src="files/DSC00001.JPG" alt="picture" width="400" height="300" align="left" /></description>
<Point id="geom_0"><coordinates>18.9431816667,9.44355222222,0.0</coordinates>
</Point></Placemark></Document></kml>
If the above code after placing place mark tag doesn't work then try with Balloon Style instead of description tag try with below code
<kml xmlns="http://www.opengis.net/kml/2.2"
xmlns:gx="http://www.google.com/kml/ext/2.2"
xmlns:kml="http://www.opengis.net/kml/2.2"
xmlns:atom="http://www.w3.org/2005/Atom"
>
<Document id="feat_1">
<Placemark id="feat_2">
<name>DSC00001.JPG</name>
<Style>
<BalloonStyle>
<text><![CDATA[
<table width=100% cellpadding=0 cellspacing=0>
<tr><td><img width=100% src='files/DSC00001.jpg' /></td></tr></table>]]>
</text>
</BalloonStyle>
</Style>
<Point id="geom_0">
<coordinates>18.9431816667,9.44355222222</coordinates>
</Point>
</Placemark>
</Document>
</kml>