HUNTMAN68

So I made this custom modpack for my friends and I and It launches in vanilla everytime I try. My modpack is modpack.jar not modpack.jar.jar, and I believe I have everything else right, it just wont work. The url for the pack is. If anyone could help me figure it out, it would be greatly appreciated. Thanks https://www.dropbox.com/s/7gjd48h522wn1bl/My%20Modpack.zip?dl=1