hello i have a custom server set up and running a zombie mod 1.0 and when ever someone trys to connect they can download all the map.iwd files but then they get this error. i am wondering why that is and what i can do to fix this any help would be great thank you

client error message:
Fastfile for zone 'mod' is corrupt or unreadable

i have all my files redirected to a web server and it is giving them that error i am just wondering why that is.

my redirect settings are.

set sv_allowdownload "1"
seta sv_wwwDownload "1"
seta sv_wwwBaseURL "mysite.com/redirects2"
seta sv_wwwDlDisconnected "0"

inside my redirects2 folder i have
/mod/zombies which contains the zombie mod 1.0
/usermaps which has all the maps that i am going to use on the server.

im not sure if there is something that i am not doing right or what but it just does not wan't to work. any help would be great. thank you.