No 'Pay again" button showing for open orders?

I’ve seen some people have had some issues with open orders and the button not working. The solution will be great if i can get the button to appear.

I have the pay again option selected in Admin>Order statuses>Open have emptied the cache and tested with a customers open order using the “act on behalf of” feature and no button appears. Now i get why i didn’t get any conversions of open orders even after i emailed them a discount coupon!

This is important and a solution will help any other forum readers in the same boat. It may pay to check it on your own sites if you haven’t already done so.

Any help appreciated!

many thanks,