need help udp server

[FoufaDjo]

my server send data only to my last active client and idk why here is my code:
server creat event:
var type = network_socket_udp;
var port = 8000;

socket = network_create_socket_ext(type,port);
remote_port = 0;
remote_ip = "0.0.0.0";

var type = buffer_grow;
var alignment = 1;
send_buffer = buffer_create(1,type,alignment);



server network Async:
remote_port = async_load[? "port"];
remote_ip = string(async_load[? "ip"]);

var buffer = ds_map_find_value(async_load,"buffer");
var socket = ds_map_find_value(async_load,"id");
buffer_seek(buffer, buffer_seek_start,0);
scr_server(buffer,socket);



scr_server:
var buffer = argument[0];
var socket = argument[1];

var message_id = buffer_read(buffer, buffer_u8);

switch(message_id){
case network.movement:
var op = buffer_read(buffer,buffer_u8);
var target = -10;
with oplayer{
if p = op{
var target = id;
}
}
var i = 0;
repeat(ds_list_size(socket_list)){
var sock = ds_list_find_value(socket_list,i);
buffer_seek(send_buffer, buffer_seek_start,0);
buffer_write(send_buffer, buffer_u8,network.position);
buffer_write(send_buffer, buffer_u8,op);
buffer_write(send_buffer, buffer_s16,target.x);
buffer_write(send_buffer, buffer_s16,target.y);
network_send_udp(sock,remote_ip,remote_port,send_buffer,buffer_tell(send_buffer));
i ++;
}
break;
}