public OnPlayerSpawn
{
SetPlayerPos(playerid, float:x, float:y, float: z);
return 1;
}
| 
 I assume, you're using the login and after the player is logged in you spawn him. You can either use SetSpawnInfo or set player's position like FireCat posted. 
 | 
| 
 Hmm, we'll find out why, but I need you to show us a part of code? 
 | 
public OnPlayerSpawn(playerid)
{
    TogglePlayerSpectating(playerid, false);
	// Anti F4 Bug - Logging/Registering
	if(!PlayerInfo[playerid][pLoggedIn] && !IsPlayerNPC(playerid))
	{
 		if(DID_IJUSTDIE[playerid])
        SetPlayerPos(playerid, MYCOOL_COORDS[playerid][0], MYCOOL_COORDS[playerid][1], MYCOOL_COORDS[playerid][2]),
        SetPlayerFacingAngle(playerid, MYCOOL_COORDS[playerid][3]),
        TogglePlayerControllable(playerid, false),
        DID_IJUSTDIE[playerid] = false;
		if(IsPlayerNPC(playerid)) return 1;
		SetPlayerJoinCamera(playerid);
	    SetSpawnInfo( playerid, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
	    new file[64];
		format(file, sizeof(file), "users/%s.ini", RPNU(playerid));
	    // Player isn't banned
	    if(dini_Int(file, "AdminAccount") == 1)
		{
		    format(file, sizeof(file), "users/%s.ini",RPNU(playerid));
		    SetPlayerName(playerid, dini_Get(file, "OldName"));
		    format(file, sizeof(file), "users/%s.ini", RPNU(playerid));
		    ShowDialog(playerid, 2);
		}
		if(!dini_Exists(file))
		{
		    ShowDialog(playerid, 1);
		    return 1;
		}
		else
		{
			ShowDialog(playerid, 2);
		}
		return 1;
	}
	// Actual Spawning
    ResetPlayerWeapons(playerid);
	if(IsPlayerNPC(playerid)) //Checks if the player that just spawned is an NPC.
	{
	  new npcname[MAX_PLAYER_NAME];
	  GetPlayerName(playerid, npcname, sizeof(npcname)); //Getting the NPC's name.
	  if(!strcmp(npcname, "GOD", true)) //Checking if the NPC's name is GOD
	  { //Putting the NPC into the vehicle we created for it.
	    return 1;
	  }
	  return 1;
	}
    if(PlayerInfo[playerid][pLoggedIn] && PlayerInfo[playerid][pSpawn])
    {
        FalseBan[playerid] = 0;
        SetTimerEx("FalseBanFix", 6000, false, "i", playerid);
		SpawnChar(playerid);
    }
    if (!GetPVarInt(playerid, "color")) SetPVarInt(playerid, "color", 18643);
	return 1;
}
| 
 
					Originally Posted by SA:MP Wiki 
This function can be used to change the spawn information of a specific player. 
 | 
SetSpawnInfo( playerid, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
MYCOOL_COORDS[playerid][0]
MYCOOL_COORDS[playerid][1]
MYCOOL_COORDS[playerid][2]
MYCOOL_COORDS[playerid][3]