MonozePS3

I'm creating my own modpack (Minecraft version 1.7.10) with the newest Forge version and when I start the pack is an error message which says: "Forge Mod Loader has found a problem with your minecraft installation The mods and versions listed below could not be foun: ForgeMultipart: minimum cersion required is 1.1.1.321". But when I put the newest version of Forgemultipart in my mod folder, then comes that mods doubly degenerate (Forge Multipart). And when I delete the old version of ForgeMultipart, and start the mod pack again then istalled again the old version. Does anyone know what the problem is and how I can fix it?