4
Thank you very much for your help.
It was a local problem.
I was using a computer with EZ Firewall on it. Under the privacy setting, I can turn on "Ad Blocking". High blocks all banner ads and all pop-up/pop-under and animated ads. Medium - where it was set - blocks all Pop-up/pop-under and ANIMATED ADS. Of - well that is just off.
Somehow it had gotten turned on several days after I had put the ads on line.
The moral of the story is that I need to design the ads so that they work even if they are frozen. The first image on the ad should make sense for those that have the ads on but frozen!