Help Max Blessed And Crystal

Hi guys can help me? How fix this code? I saw on forum another code, but he doesn't work. I him liitle bit fixed but still don't work. What i should to do? I tried add if (_isCrystal) or if (_bisBlessed) but nothing.

what i need to do for fix max enchant?

package net.sf.l2j.gameserver.network.clientpackets;

import java.util.HashMap;
import java.util.Map;

import net.sf.l2j.Config;
import net.sf.l2j.gameserver.model.item.instance.ItemInstance;
import net.sf.l2j.gameserver.model.item.kind.Item;
import net.sf.l2j.gameserver.model.item.kind.Weapon;
import net.sf.l2j.gameserver.model.item.type.CrystalType;
import net.sf.l2j.gameserver.model.item.type.WeaponType;

public abstract class AbstractEnchantPacket extends L2GameClientPacket
{
	public static final Map<Integer, EnchantScroll> _scrolls = new HashMap<>();
	
	public static final class EnchantScroll
	{
		protected final boolean _isWeapon;
		protected final CrystalType _grade;
		private final boolean _isBlessed;
		private final boolean _isCrystal;
		
		public EnchantScroll(boolean wep, boolean bless, boolean crystal, CrystalType type)
		{
			_isWeapon = wep;
			_grade = type;
			_isBlessed = bless;
			_isCrystal = crystal;
		}
		
		/**
		 * @param enchantItem : The item to enchant.
		 * @return true if support item can be used for this item
		 */
		public final boolean isValid(ItemInstance enchantItem)
		{
			if (enchantItem == null)
				return false;
			
			// checking scroll type and configured maximum enchant level
			switch (enchantItem.getItem().getType2())
			{
				case Item.TYPE2_WEAPON:
					if (_isWeapon || (Config.ENCHANT_MAX_WEAPON > 0 && enchantItem.getEnchantLevel() >= Config.ENCHANT_MAX_WEAPON))
					return false;
					break;
				
					if (isWeapon)
					if (_isWeapon || (Config.ENCHANT_MAX_BLESSED_WEAPON > 0 && enchantItem.getEnchantLevel() >= Config.ENCHANT_MAX_BLESSED_WEAPON))
					return false;
					break;
					
					if (_isWeapon || (Config.ENCHANT_MAX_CRYSTAL_WEAPON > 0 && enchantItem.getEnchantLevel() >= Config.ENCHANT_MAX_CRYSTAL_WEAPON))
					return false;
					break;		
					
					case Item.TYPE2_SHIELD_ARMOR:
	                if (_isWeapon || (Config.ENCHANT_MAX_ARMOR > 0 && enchantItem.getEnchantLevel() >= Config.ENCHANT_MAX_ARMOR))
	                return false;
	                break;

	                if (_isWeapon || (Config.ENCHANT_MAX_BLESSED_ARMOR > 0 && enchantItem.getEnchantLevel() >= Config.ENCHANT_MAX_BLESSED_ARMOR))
	                return false;
	                break;
	                
	                if (_isWeapon || (Config.ENCHANT_MAX_CRYSTAL_ARMOR > 0 && enchantItem.getEnchantLevel() >= Config.ENCHANT_MAX_CRYSTAL_ARMOR))
	                return false;
	                break;
	                    
	                case Item.TYPE2_ACCESSORY:
	                if (_isWeapon || (Config.ENCHANT_MAX_JEWELS > 0 && enchantItem.getEnchantLevel() >= Config.ENCHANT_MAX_JEWELS))
	                return false;
	                break;

	                if (_isWeapon || (Config.ENCHANT_MAX_BLESSED_JEWELS > 0 && enchantItem.getEnchantLevel() >= Config.ENCHANT_MAX_BLESSED_JEWELS))
	                return false;
	                break;
	                
	                if (_isWeapon || (Config.ENCHANT_MAX_CRYSTAL_JEWELS > 0 && enchantItem.getEnchantLevel() >= Config.ENCHANT_MAX_CRYSTAL_JEWELS))
	        		return false;
	        		break;
	        				
	                default:
	        		return false;
	        	}