Server Problem

[H0wTh3?]

Hello im new here and there's a problem with Codjumper server #2. When i try to join the server I get a loading screen that's ok it looks like im downloading the mod but then my screen goes black and a error pops up. It says "Fastfile for zone 'mod' is empty" ok so i check in the mod folder and it says mod.ff 0 kb z_cod4jumper 0 kb its like the server is overwriting the mod files with corrupted files. How can i fix this?