What version Publisher are you using? In 2002-03, format, background. The background
will be on one page only.
If you are using older versions, don't put the background on the "Background Page",
insert it on the publication page. Draw a rectangle to fit your page, fill, fill
effects...send it to the back.
Or, insert, picture, new drawing, expand the canvas to fit your page, draw a
rectangle to fit, fill, fill effects, picture tab, browse to the picture you want on
the background.