I am trying to create a simple mouse-over effect (gray scale to color) using a logo and I cannot get it to work. I linked the mouse-off image to a page, created a new layer for the mouse-over effect and checked the "Show pop-up layer" in the Mouse-over dialog with the new layer selected, but when I preview in Xara or browser nothing changes. I have watched two video tutorials and both show that this is how it's done. What am I doing wrong?