FotoMagico dissolve vs superimpose

When I’m using the Dissolve transition I expected the slides to be superimposed, but instead I’m getting a fade out to black. How do I to get a superimpose effect: slide 2 to appear over slide 1 before that one fades out?

OK, I solved this - never touch the visibility menu under Image! But now, when I’m sending my slides off to a simple movie all my dissolves have become hard transitions. Each slide has 4 seconds showtime and 2 seconds of a dissolve transition. So what am I overlooking?