I'm trying to setup a server for FTB: Interactions. Since it's not in the modpack list yet, I tried to follow the guide for Uploading custom server. Upon joining the server, I see all the mods listed, but a bunch of them don't seem to be working (to include the FTB questing mod), and the world spawn is not the default island in the void.
P.S. If it helps, I set the server up using the vanilla Minecraft option in the games list (I figured using another FTB pack to build off of would result in some weird stuff).