[nepstep]

Weird..
Its working for me..

pawn Код:

#include <a_samp>
#include <streamer>

main()
{
}

new kupno[5];
public OnPlayerConnect(playerid)
{
SpawnPlayer(playerid);
return 1;
}
public OnPlayerSpawn(playerid)
{
SetPlayerPos(playerid,-1650,1206,7.25);
return 1;
}
public OnGameModeInit()
{
kupno[0] = CreateDynamicPickup(1274, 1, -1657.8188, 1210.8721, 7.2500, 0, 0, -1, 15.0);
}
public OnPlayerPickUpDynamicPickup(playerid, pickupid)
{
    if(pickupid == kupno[0])//salon
    {
        ShowPlayerDialog(playerid, 1, DIALOG_STYLE_MSGBOX, "Cars - sporting", "Write /buy for buy a car.", "Buy", "Cancel");
        SendClientMessage(playerid, -1, "yyy2");
    }
    return 1;
}

Try this test gamemode and see if it works for you