Games : You must run 1.8-pre1 on minecraft zoom mod

So I tried to get a zoom mod for Minecraft 1.8, so after i installed it i double clicked the file to start up the install wizard. But when I hit install, it cam up with this message: "you must run the version 1.8-pre1 manually at least once" I ran 1.8 on all of my profiles but it didnt work. I don't know what to do!