ALLzooNz

Hey! I play online with my friends and I wonder how I put mods online, I've tried everything, I want to put snow mod, would be awesome if someone could help me. I push up the list where I see people who come near me o go into the settings where it says that I can push in the winter courage box, but it is not for the gray, what should I do for it to be white so I can tick so it changed? // ALLzooN