Default Tasker wallpaper questions

I'm trying to get Tasker to set a wallpaper, however no matter what I try, it always only puts a section of the image as my wallpaper. I have the picture set to the same size as my phone (1080x1920), but it only gives me a centered section on the far left of the image, almost as if Tasker zoomed in as far as it could and put that as the wallpaper.
My devices:
Samsung Galaxy Nexus (T-mobile), Shiny ROM, Rooted, philz recovery
Samsung Galaxy S Blaze 4G (T-mobile), Stock, Rooted, philz recovery