Delivery screen problem

Hi dears;
I have a question with Delivery screen. I follow the steps on tutorial of Delivery Custom but I face a problem. my problem is after select the order from Lister1 and click on the Deliverer button nothing happen as no order viewed on Lister2, the deliverer button has no response while no action happens. I read the tutorial and review the steps a million time but no new. what I have to check?

Thanks a lot.