ok, it works on initial screen load but, When I enter the Date Rage for which I want to book the Serial number it removes the drop down select option for some reason. (I have an OnClick event on the date inputs for it to refresh the SQL and the Combo Box to only display ones that are not booked out during the chosen Date Range)
Below is the initial Load (Testing on the Monitor selection only) As you can see, No dates are input and the Combo select is there, indicated by the Downward arrow on the "Choose Serial number" combo.
But....
As you can see below, as soon as I input my required dates the DropdownSelect is no longer an option and it goes back to a standard combo box.

A little Strange
Thanks
Mike