Position verification

Hello, I'm doing a quest plugin (it will be public in the lite version), and I need to verificate if player is on a certain position. I did it but it doesn't work. I tried several techniques so if you see inconsistencies it's normal.

Here is my code :

PHP:

    public function onPlayerMove(PlayerMoveEvent $event){
        $player = $event->getPlayer();
        foreach ($this->quests as $quest) {
            if ($quest instanceof Quest) {
                $type = $quest->getType();
                $playerPos = $player->getPosition();
                if ($type == QuestTypes::WALK_POINT){
                    $quest_data = new Config($this->getDataFolder() . 'quests/' . $quest->getName() . '.yml');
                    $level = $objectiveValue[3];
                    if ($playerPos->getFloorX() == $quest_data->get('value_x') && $playerPos->getFloorY() == $quest_data->get('value_y') && $playerPos->getFloorZ() == $quest_data->get('value_z') && $playerPos->getLevelNonNull()->getName() == $quest_data->get('value_level')) {
                        if (file_exists($this->getDataFolder() . 'players/' . $player->getName() . '.yml')) {
                            $player_data = new Config($this->getDataFolder() . 'players/' . $player->getName() . '.yml', Config::YAML);
                            if ($player_data->exists($quest->getName())) {
                                $player_data->setNested($quest->getName() . '.value', 'finish');
                                $player_data->save();
                                $this->questFinish($quest, $player, $player_data);
                            }
                        }
                    }
                }
            }
        }
    }

And here is my .yml quest data :

PHP:

name: Walkpoint-item
description: Walk to 0 150 0 in world
type: 1 #Walkpoint
code: walkitem
reward:
  - 2 #Give item
  - 64
  - "1:0"
  -
  -
value_x: 0
value_y: 150
value_z: 0
value_level: world

 

Update : I did experimentations and that's the config's get function who don't work