I am having problems too. Can you possibly create a file that has the files: bin, mods, coremods, and config, with a modpack.jar file with a forge installation in it? It be extremely helpful.
Also, if not could you give some advice? My pack is here:
https://dl.dropbox.com/s/ioih08t5s6k3taz/ScienceEct0_1.zip?token_hash=AAEx60S6mZf_AwTRMnNl6LYjDDAIixscL93ljvxzG6WiWw&dl=1
I double checked the file, and tried two different file hosts, and it didn't work either time. It will launch, but only as Vanilla.