Clay.io Adverts Problem

Clay.io Adverts Problem

I have a advert scale issue in internet explorer, when I have the window full screen the adverts are fine. But when I have the window half the size the adverts do not scale to the game. They work fine in chrome. When I test my game in construct 2 I get this Javascript error if I test using IE, (no errors with chrome)., line 0 (col 0)

Any ideas?

Thanks