I added background images for one layout it is not shown in

I added background image for one layout it is not shown in user and group Admin account and i gave all permission to that user and group admin to access to that layout, Please help me

when i click on thumbnail i got this message,

Failed to load image: index.php?p=module&mod=image&q=Exec&method=GetResource&mediaid=455

thanks in advance.

Are you using 1.7.8 CMS?

You could try editing permissions for that layout and make sure ‘Update these permissions on all layouts, regions and media.’ is enabled as well.