not007

Hi, I wanted to make a modpack for my friends and I to play on. It's similar to the 1.7.10 pack but with some extra stuff, so I figured it should be pretty easy. i'm hosting the files off my home server, and I've confirmed that my server's not down - you can download the ZIP file for the modpack through HTTP in a web browser, however in the technic launcher the download hangs at -2147483648%. [here's a screencap] does anyone know what's causing this or how to fix it? My guess would be that it's my server, though i've tried multiple hosting methods thanks! also, ignore the name of the modpack, I'd made like 4 different ones to confirm that it wasn't an issue with my config or something and had run out of ideas. edit: i forgot to mention that eventually you get "error downloading a file for the following pack {pack name} failed to download {the location of the file on my home server} please consult the modpack author."