Minecaft not enough items

I have downloaded the minecraft not enough items. I have put the codechickencore and the nei folders in my mod folder. The mod opens up when I play minecraft but when I try to spawn an item (eg. Dirt) by either clicking on it or dragging it over into my inventory it will disappear. I have tried it on cheat, recipe, and utility mode and nothing changes. Also there are no save files on the left of the screen when I open nei.

If you're on a server, Not Enough Items will not activate. You need to be on single player. Also, I think Not Enough Items is disabled if you disable cheats in a single player world.