Minecraft Forums

So, when I open mods, it does it perfectly fine. But, when I am in the mod, and I press esc my mistake, when I click "Back to game", the mod just crashes. It does this on every mod I do. Example: If I am on a mod and I want the difficulty to be Peaceful (I could of done /difficulty, but I was to lazy), I press esc, go to Peaceful, press Back to game, it crashes. Is there any way to fix this problem? Please help.