ManLikeZing

I've been spending hours now just trying to get my modpack to work with the Technic launcher but it will not work no matter what. It works just fine using the Minecraft client as well as using MultiMC but as soon as I use the Technic launcher to download it and run it, it just runs vanilla Minecraft. I have "modpack.jar" in the bin folder, with the correct version of Forge. Why is the Technic launcher messing up the modpack? Why won't it just load forge?