I am using Inventoria Stock Manager to manage our inventory and Express Invoice for generating invoices and selling. I find that the quantities are not always being updated in Inventoria when an item is sold and I can't view sales history on any items because nothing shows up under sales history in Inventoria, even though they've been sold in Express Invoice. As far as I can see, there is no sales history report for items in Express Invoice that I can run either. Please help. How do I make this work?