Try deselecting the "Apply any wallpaper supplied" option in the WB config panel > Basic Settings dialog (seen in the first screenshot you linked to) - and then click the "Apply Changes" link on the left side of WB Config panel.

Reboot computer, and attempt to change wall via Display Properties > Desktop tab (seen in second screenshot).

If this fails, try the following:

1 - Unload WB

2 - Go to Display Properties > Themes tab > select Windows XP from Theme drop-down list > click "Apply"

3 - If the Windows XP default theme is now restored, try to change the wall again in Display Properties > Desktop tab

4 - If all is well, reapply the WB skin of your choice without the "Apply any wallpaper supplied"

That should do it.

Note - obviously any cracked versions (if this applies to you - not saying it does), are fraught with possible side effects....

ive just tried this and this is what ive come up with

so WB is now unloaded and still i cannot change my bg regardless but now i CAN change my color

Okay, my bad.......(crack installed).....problem exists between the chair and the keyboard.

whys only the crack version have that

and whats in my bar, the spysherrif

i got rid of it and saved myself 20 bucks