@Marcel.B
if it's a linux server, you may need to rename the mission file something simple like "dro-kerama-islands.kerama.pbo". some hosted linux arma servers are picky with names. also be sure that CBA_A3 and ace are loaded in that order for your server and player's mods in the launcher or commandline (plus any other mods you want to use).

if the server is successfully starting and you see the mission, you are likely missing either the mod load order, the mods themselves, or there is a naming issue with one or both mods and mission file.

Dear Chazzbotic, i actually love your Missions but i encounterd a little problem my friends and i are playing your DRO's via lan hosted Server now we wanted to get your DRO's working on a dedicated server but as soon as we place your mision on the server there are no Player slots do yuo have an fix for us or idea what the problem could be Thanks in Advance SgtHiro