I am totally confused.... This works locally But not on th server -- do I have to write to the World datebae?

public void PlayerInventoryToChestEvent(PlayerInventoryToChestEvent event){
            Player player = event.getPlayer();
    final int infoId = event.getChestID();
    String Pname = player.getName();
    Chest chest = getWorld().getChest(infoId);
            if (infoId == 2103){
   String query = "SELECT * FROM Money WHERE `User` = '" + Pname + "'";
    try (ResultSet result = db.executeQuery(query)){
                while(result.next())
			{
                String User= result.getString("User");
                int Amount = result.getInt("Amount");
               int  total = Amount+10;
                   db.executeUpdate("UPDATE `Money` SET `Amount` = '" + total + "' WHERE `User` = '" + Pname + "' ");


                    }    
                //p.setAttribute("TotAmount", 2000);
                        }  
                catch (SQLException e)
		{
			e.printStackTrace();
                }






       chest.clear();
    }
    player.sendTextMessage("[#ffff00] chest id: " + chest.getID());
    }