PTF to add journal voucher-Fin 9.2 Image 47 and Tools 8.59.09

I'm using PTF to add a journal voucher. When I go to add a new distribution line, a dialog box pops up so I can tell it how many new rows to add. I only need one added. I can't figure out how to get the "1" accepted and have it click on the OK button for the PTF script. I can get the script to bring up the prompt box, but can't get it click on the OK button.