WB Backdrops displays funny

[punkyclown]

Hi, I am running OS 3.9 and when I try to load an .iff as a backdrop on my Workbench the color inverts, so it looks like the image when you open a requester window, with inverted color.  How can I get it to display the correct palette?
Thank you

[punkyclown]

My image is fine when dispalyed in a viewer, but when it Loads in WB the colors look like the way an image looks when you go to save it, when the save window opens the colors of the image change and that's exactly the way the image looks like when it loads in WB, the colors invert, like that have the opposite palette, like a negative..

Thanks