Before we proceed any further: where did you get WaW?

I said in my first reply, my friend shared it to me on steam.

UGX Cabin worked for me and from my last time playing it, it uses a custom Main Menu.

Can you confirm UGX Cabin's folder is in the following folder:

C:\Users\USERNAME\AppData\Local\Activision\CoDWaW\mods

A faster way to get to this folder is to type this into run or any Explorer address bar:

%localappdata%\Activision\CoDWaW\mods

Ok before the Mods file was in my cod waw username folder and I now moved it to the Cod waw folder. Now I can see the mods in the mod menu but when I click one of them, it just takes me back to the Main menu.

One of the maps I tried to download is Ugx Cabin.

So I just got Cod Waw from my friend because he shared it to me on steam, I don't know if this has anything to do with it but when I launch a map, it just takes me to the Waw main menu. Can someone help me with this?