ACH Prenote question

Hi,We are in the process to testing the ACH Prenote. I believe I set up everything correctly for Prenote but for some reason the Pay Cycle is not creating Pre Note file. Since I selected "Prenote required" for the Vendor, when I created a ACH voucher, system changed it to CHK and the Pay Cycle created a check but didn't create the Pre Note file. Below are the steps what I have done so far. I am not sure if I am missing any step. Any help would be greatly appreciated.

1) External Bank Accounts --> Payment Methods.

   

          Prenotification Required Check Box is checked.