As the tittle says I cant play modded, I fired up BO_mods and open up the "Mods" menu, I chose the mod I want however when I press "Zombies" It just says "Connecting to Servers". However this does not happen to the map "Battery" (which I downloaded a while ago).
So I have I done a mistake whilst downloading the mods/maps or what is exactly going on here.
 
Im new to all this so don't expect much lol.