im getting a problem in adrotator sample project

The following are the properties of AdRotator control.

1. AdvertisementFile: The path of the XML file in which you store the information of images.
2. AlternateTextField: A data field to use instead of the Alt text for an advertisement.
3. ImageUrlField: The name of the image url field in which image path is store.
4. NavigateUrlField: The name of the navigate url field in which navigate url is store.
5. Target: The target property specify frame that display the content of the AdRotator. It has four type
_blank, _parent, _self, _top.

try to change:-

<?xml version="1.0" encoding="utf-8"?>
<Advertisements></Advertisements>
<Ad>
<ImageUrl>Adds\\CA.JPG</ImageUrl>
<NavigateUrl>http://www.google.com</NavigateUrl>
  <AlternateUrl>canada</AlternateUrl>
  <Impressions>25</Impressions>
  </Ad>
<Ad>
  <ImageUrl>Adds\\UK.jpg</ImageUrl>
  <NavigateUrl>http://www.gmail.com</NavigateUrl>
  <Alternate Text>United states</Alternate Text>
  <Impressions>25</Impressions>
</Ad>

to

<?xml version="1.0" encoding="utf-8"?>
<Advertisements>
<Ad>
<ImageUrl>Adds\\CA.JPG</ImageUrl>
<NavigateUrl>http://www.google.com</NavigateUrl>
  <AlternateUrl>canada</AlternateUrl>
  <Impressions>25</Impressions>
  </Ad>
<Ad>
  <ImageUrl>Adds\\UK.jpg</ImageUrl>
  <NavigateUrl>http://www.gmail.com</NavigateUrl>
  <Alternate Text>United states</Alternate Text>
  <Impressions>25</Impressions>
</Ad>
</Advertisements>