I try to apply minecraft maps I did it o herobrine's return map but I did another one but it wasn't applyed

Put the summary of the bug you're having here

What I expected to happen was...:
It would be applied
What actually happened was...:
It wasn't applied

Steps to Reproduce:
1. copy the map
2. go to start and type in %appdata%
3. paste the folder in roaming/.minecraft/saves