Than you for the reply  
	I already checked the config file but there is no trace of this option...
 
	If i try to change the value of "#Start Id for enchants" i always have error with Ars Magica 2.
 
	 
 
	#Disable Chat Bubbles 
	EnableChatBubbles=true
 
	#Uses unique entities ids 
	UseUniqueEntities=true
 
	#To use this UseUniqueEntities has to be false 
	EntityStartId=120
 
	#Navigation search range for NPCs. Not recommended to increase if you have a slow pc or on a server 
	NpcNavRange=32
 
	#Set to true if you want the dialog command option to be able to use op commands like tp etc 
	NpcUseOpCommands=false
 
	InventoryGuiEnabled=true
 
	#Enables CustomNpcs startup update message 
	EnableUpdateChecker=true
 
	#Set to false if you want to disable guns 
	GunsEnabled=true
 
	#Only ops can create and edit npcs 
	OpsOnly=false
 
	#0: Options dialog, 1: Wheel dialog 
	DialogType=0
 
	#Default interact line. Leave empty to not have one 
	DefaultInteractLine=Hello @p
 
	#Start Id for enchants 
	EnchantStartId=100