[milanosie]

Try this one:

pawn Code:

public OnPlayerDeath(playerid, killerid, reason)
{
    if(gTeam[killerid] == TEAM_ZOMBIE)//That's your first oen that works good.
    {
        gTeam[playerid] = TEAM_ZOMBIE
        GameTextForPlayer(playerid,"~r~Infected",3000,4);
        gTeam[killerid] = TEAM_HUMAN;
    }
    return 1;
}