you need to configure the recordset to filter on the DetailOrderID querysting that is passing the order ID over
edit the WADAorderdetails recordset:
SELECT orders.*, orderdetails.* FROM orders INNER JOIN orderdetails ON orders.OrderID = orderdetails.DetailOrderID WHERE orders.OrderID = paramOrderID
then create a new variable in the variables section:
Name: paramOrderID
Type: integer
Default Value: -1
Run Time Value: $_GET['DetailOrderID']