Problem with a map

[xnodunitx]

I downloaded the Zanzibar map for HaloCE and H2 Zanzibar,whenever I try to join the "Zanzibar" map however it says I cannot join the server,but when I try the H2 Zanzibar it shows no problem,anyone know how to fix this?

[Spartan Sniper]

try to download it again and if that doesn't work then ask someone that has the map to tell u what could be wrong