If it doesn't appear in the server mods list, then it didn't load for some reason. Either the mods.json file has a problem, or the modinfo file does. You could try altering the modinfo file to see if anything is wrong with it; the only thing that's important in the server mod is that that files shadow the in-game ones. I'm assuming you aren't using atom shell PAMM, and the one I posted was made for atom shell PAMM, so there might be something that isn't configured right for use without it. Let me know if you find out what the issue is, I'm sick right now and really don't want to start testing things ATM.