Values set to the property is not carrying

Hello all, this is my very first post.I ve a very strange problem in my asp.net shopping cart applicaition. 
    Every new item order will be stored as a generic list in class file as below
      Dim NewItem As New CartItem()       NewItem.ProdID = ProdID NewItem.Quantity = Quantity
NewItem.Price = Price
NewItem.ProdDesc = ProdDesc
NewItem.Comments = Comments
ShoppingCart.Items.Add(NewItem)
where CartItem is ...