I haven't seen anyone mention this yet, so I will post this here. After the September 10th Invitation Maker update all mods were given IDs. If you made a mod before September 10th the mod was given an ID of zero. Mods can not be used together if their IDs are the same. Dear mod creators this means if you do not go in an change your mod ID your mod will not be usable with other mods made before the update. I did not make this to demand anyone to go change their IDs, I only want to inform mod makers who are unaware of this change. I hope this helps.