Examples of an ad link that has to be submitted. Just make sure this ad exists! 

1. http://imageserv.imgis.com/images/Ad13189St1Sz1Sq5_Ban10.gif

2. http://imageserv.imgis.com/images/Ad12669St1Sz1Sq1_Ban1.gif

3. http://imageserv.imgis.com/images/Ad13700St1Sz1Sq1_Ban1.gif

Sorry, but I didn't made a link from those above ads... I'm just doing my job and fair to everyone.