[Infected Wars] Problem

I have recenly been trying to get infected wars on my server. It wont work. It’s added and what not, but when I try to switch the gamemode to it, it wont work. I dunno if I need the maps or what. I have a few of them from other servers. If it is the maps, can anyone give me links to them? Or even some names of them. I don’t know names of maps on Infected wars therefore I can’t add them in.