Construct class with enum parameter (javascript)

I declare my enum and my class constructor to take an int and an enum as parameters. Then i try to construct the class and I get the message:

The type 'ItemStackStruct' does not have a visible constructor that matches the argument list '(int, ItemType)'.

It works fine when I change the constructor to just take an int! What's wrong with this code?

 enum ItemType
 {
     DIRT,
     SEED,
     MAX_ITEMTYPES
 };
 
 class ItemStackStruct extends System.ValueType
 {
     //fields
     var type : ItemType;
     var amount : int;
     
     //Constructor 
     public function ItemStackStruct(amount:int, type:ItemType )
     {
         this.type = type;
         this.amount = amount;
     }
 }

.. Later:

 inventory = new ItemStackStruct[8];
 inventory[0] = new ItemStackStruct(32, ItemType.DIRT);

EDIT: Also, I should mention that the creation of the class is done in a different script. It's not something stupid to do with compile order or something?