responsive or any type of sizing is not working

HI, no matter what setings I add to popup pro, my pop ups are not responsive, I have a simple image as the pop up but when it loads and I check resposive, the box is extended width to the right of the image on large screens and on smaller screens it simply closes up over the image (not very elegantly either) and hides the overflow.

I have tried setting the popup to be a fixed size also but this just seems to behave in the exact same way.

any help would be great.