andCZ

What's the full name of the forge file you are using (before you renamed it to modpack.jar)?

So uh. I downloaded the same modpack you were using. I removed the older forge, and added the same forge you are using. Got it started for a bit before the older Optifine version broke it.
Quite unsure what you did so it doesn't work. The error in your log usually means wrong Forge/Minecraft version.