Removing background images, or...

I've got a document with bl**dy annoying background images, or watermarks.
I've tried to remove them as per Acrobat CS4 Help, but they are still there.

I can select the image, so I guess it must be a separate object.

How do I remove them? See extract below:

http://www.mercier.org.uk/temp/Test.pdf

Removing background images, or...

Use the TouchUp Object Tool to select the images and then press Delete.

Removing background images, or...

Or open the content panel, right click and item to select highlighting, traverse through the tree and delete when you encounter the image.

Fantastic, thank you.