alternative payer in f-28

Good morning,

as you can see from the picture I have define account 12006 with alternative account egual to 12004.

In F-28 I expected to find open items from both 12006 and 12004, but when I use 12004 I can found only open items on 12004 ... The result i would expect is: when using in F-28 account 12004 I would like to see open itesm from 12004 and also for 12006.

Coud you kindly suggest me how?

THanks a lot.

Best regards.