Minecraft pc no mobs are spawning?

No mobs (hostile and animals) are spawning in my world. It's a new world I just create to use these mods I jut downloaded. I looked around there are none whatsoever and I have the mo creatures mo installed. I deleted the world and created a new one, still no mobs:/ please help

Guest

Make sure the Difficulty is set to "Easy" not "Peaceful"

Haha, I laughed when I saw this.

Samuel