How do I actually Print a Vendor Check?

Dear 

I am following the GENERATE PAYMENT to the letter 

https://technet.microsoft.com/en-us/library/Gg232194.aspx

and I did all the related setup for Bank Check layout and for the method of payment

but I am missing the steps where I actually print the check after posting,

I went to the AP module and clicked on Payment History but the Print Payment Copy button is disabled/ greyed out.

what Setup am i missing ?