XML Data Reading...................................

u should use adrotator control and xml file
and this xml file shold have these tags

<?xml version="1.0" encoding="utf-8" ?>
<Advertisements>
  <Ad>
    <ImageUrl></ImageUrl>
    <AlternateText></AlternateText>
    <NavigateUrl></NavigateUrl>
    <Impression></Impression>
  </Ad>
</Advertisements>

in between this ImageUrl write image path like images/01.jpg
if picture not found it will show the path u type in AlternateText
after that use adrotator and select this file with adrotator.