I have 5 DateTimePicker controls on my form, each containing the date and time. Their Value properties are all bound to the appropriate fields in the database. However when I execute the EndEdit() statement for my BindingSource it gives an error saying that the column bound to the first DateTimePicker doesn't allow nulls. None of the other controls seem to have a problem, only the DateTimePickers. Also, I have set the columns in the database to allow nulls and it still gives the message. Would anyone happen to know if there's any other binding that needs to be done or any special provisions with that type of control? Thanks in advance.