Done!, i figured it out

The location of the folders with maps was not correct

I'll tell how I did it:

for exe: +set fs_game "mods/ModWarfare" +exec server.cfg +set g_gametype "dm"

server.cfg in folder "main" It only has settings for the scorelimit and timelimit for 'dm' and 'war'
// Team Deathmatch Settings
set scr_tdm_scorelimit "20"
set scr_tdm_timelimit "20"
// Deathmatch Settings
set scr_dm_scorelimit "20"
set scr_dm_timelimit "20"
set scr_player_sprinttime "10"

in GameFolder: usermaps/mp_dust2. in mp_dust2 folder only files: mp_dust2.ff + mp_dust2_load.ff
in GameFolder: Mods/ModWarfare. in ModWarfare folder only file: mp_dust2.iwd

/Bind F12 map mp_dust2