Background Image & imlepemented Logo is not shown

I chose one of the standard backgrounds and i implemented a Logo into the form. In the first few tryouts, the images have been shown. But now both images are not shown anymore in the form.

When i click on preview, than i can see the pictures in the popup window. But when i click on "open in a new Tab" than the images are not there anymore.

what is the problem?

Hi,

When i check your form, everything looks fine: 

Do you have any problem now? 

Thanks.