Please don't bump ten minutes after asking a question.
Your mods don't work anymore because Minecraft was updated today. With Minecraft being updated, the obfuscation for the code changed, meaning a mod that made X happen to Y is now trying to make X happen to P, and causing errors.
Modders will have to individually update all of their mods. It's a long and unfun process.
Rollback Post to RevisionRollBack
Games that are still enjoyed thanks to modding-
Morrowind, Oblivion, Starcraft, Garrys Mod, Half-Life (And thus TF2, Portal, ectectect), ect.
Modability isn't just a word I made up, it's the line between Minecraft being a fad and a cult classic.