Valtago

I've ran servers off of my own computer before but with it crashing a lot lately friends of mine have pitched in to move to a hosting site. Currently using Fragnet and I just can't get the server to work. Anyone else host on fragnet that could give me a helping hand? I want to play UMS and they have that as a pre selected modpack, but when I select that and log in through technic it plays as if it were vanilla (crashing when spawning something modded into the game.)