[Rott3n]

you need to set dmflags to 262144 in your server.cfg also here is list of other flags

// dmflags -- flags that can be set in the dmflags variable.
// DF_NO_HEALTH 1
// DF_NO_POWERUPS 2
// DF_WEAPONS_STAY 4
// DF_NO_FALLING 8
// DF_INSTANT_ITEMS 16
// DF_SAME_LEVEL 32
// DF_NO_ARMOR 2048
// DF_INFINITE_AMMO 16384
// DF_NO_FOOTSTEPS 131072
// DF_ALLOW_LEAN 262144
// DF_OLD_SNIPERRIFLE 524288
// DF_GERMAN_SHOTGUN 1048576