Sage BusinessWorks

We received an overpayment for an invoice. When attempting to enter it in Direct Invoicing, it will not allow me to, stating that it is an "invalid net amount". I need to enter it so that I can refund it. Please advise? Many Thanks!!

Since I upgraded to Windows 7, back ordered items are not being flagged during order entry. Also when creating a Direct Invoice, if I enter more than one line item and unclick the tax box on one of the items, it ignores that and taxes the entire invoice…