Why can i still hit my allies mob.

[BigBurrito]

I'm trying to learn how to use some BG scripts commands, and came across with this situation.

 

set .@partyid,getcharid(1);
set $@emp_team[.@partyid],bg_create("prontera",154,150);
bg_join $@emp_team[.@partyid];
set $@emperium[.@partyid],bg_monster($@emp_team[.@partyid],"prontera",150,150,"EMP",1288,"probador#1::OnDeath");

On this code, no error, The monsters is summoned, and I've joined the BG. (Know because used @kill to see if i respawn in the right coordinate/map)
However, I'm still able to hit/kill the mob, even tho I'm on the same team. I even tried without the [.@partyid] and still was able to hit/kill the mob. Any reason why? I'm missing something?. Thanks in advance. 

[BigBurrito]

nvm. I see why. You need to turn the "battleground" mapflag for the map.