Well, the title says it all, i just take a simple bmp put it as a wallpaper, it works. I "save as" the bmp to jpg with paint.net and then put it as a wallpaper, it works. But if I do the same with png, i won't get anything but the windows background color if I try to set it up as wp.
Of course, I tried with some other png generated by other programs and it works perfectly. If anyone got an idea on what I am doing wrong it would be great.
Thanks