Quote from Peurounet
Did you deleted META-INF when you installed forge? (likely problem) Else, update java to java 7 (it may be the problem) Maybe you could also send the Forge Modloader client - 0 log something something.
Ok so yes i deleted Meta-Inf and updated java but it still didn't work. (This time i used the Ray Gun mod from the Grim's Mods thing.)