Modded Mine craft Turns into Vanilla Minecraft

[FloatPvp]

I have made a custom mod pack.(I do not take any credit for any of these mods). I have also put it into a website that works (media fire). I can also download it in the Technic launcher. But when I try to launch it (play) it turns into vanilla mine craft and not into the modded mine craft I wanted. I am using the version 1.7.10. THANK YOU FOR YOUR HELP!!! I couldn't find a video on my problem that would fix it so I appreciate you spending your time to help.

[EvilOwl]

No modpack link, no api link, no modpack.zip link aaaand wrong section. Moving to Platform Pagoda.

Fix your modpack.jar in the bin directory, I would have told you specifics but I have nothing to work with.