your ad URL returns HTTP 404 error. Looking at the URL there are some blank spaces and %5d; kind of text which doesn’t seem right:
http://ad.doubleclick.net/pfadx/N270.126913.6102203221521/B3876671.21;dcadv =2215309;sz=0x0;ord5btim estamp%5d;dcmt=text/xml
I tried to get rid of these symbols, but the ad URL still reports as HTTP 404:
Please doublecheck your ad URL.