MineCraft Forge won't work?

Everytime I try to use forge, the mod won't show up. I put it into the mods folder, but it doesn't work. It only shows Minecraft Coder Pack, Forge Mod Loader, and Minecraft Forge. It doesn't show the mod inside of my mod folder. Can anybody help me out here, it's really getting annoying.

p.s. OptiFine still works.

Are the mods compatible with that version of forge? Also are they forge mods? Not all mods work with forge, some you have to manually overwrite the class files.

Yeah, the mods I use are compatible with the version. Ex. I tried using AliensVsPredator for 1.7.2. In 1.7.2. Forge and it still didn't work. Also, when I download mods I make sure they're forge mods or not, and all my mods are forge.