If you are sure you have data in between those dates provided then May be you can try the following
1. Convert your dates into YYYY-MM-DD format instead of DD/MM/YYYY
2. Try the following query
Select [docket#],consignmentID, date_sold, qty, amount, vat,[accsale#] From sale where consignmentID >=" & txtConsID_Sales.Text & " AND date_sold >= CDATE('" & FromDate & "') AND date_sold <= CDATE('" & ToDate & "')"