Your xml file has a issue: The
<ad>
tag must be
<Ad>
Try like this:
="1.0"="utf-8"
<Advertisements>
<Ad>
<Imageurl>
"Images/images.jpg"
</Imageurl>
<Navigateurl>
https://www.google.com/
</Navigateurl>
<Alternatetext>
GOOGLE
</Alternatetext>
<Keyword>Search</keyword>
<Impression>1</impression>
</Ad>
<Ad>
<Navigateurl>
https://www.google.com/
</Navigateurl>
<Alternatetext>
Google1
</Alternatetext>
<Keyword>Search</keyword>
<Impression>2</impression>
</Ad>
</Advertisements>