Bukkit server, nether/end upload not working

Hey aternos, I tried uploading a custom map as the nether and the end but when I start my server, the end and the nether is the same, please get back to me. What should I do?? I have gone to the differnt forums and no one helped me

-Best Regards

i tried uploading a map to the world_nether and wrld_end

but when i start the server, the still remain sthe same