How can an app on facebook page be set as landingpage?

we wanted to set our app "Willkommen" on the following page as 开发者_运维百科landingpage:

https://www.facebook.com/ProfileCare?sk=app_181088235298512

At the moment the wall is the landingpage.

Looking forward to helpful answers.

Best, Kristina

"Willkommen", for me at least (UK), is the landing page.

For me also Willkommen is the landing page

However, to set the landing tab click on Edit Page and you find the option Default Landing Tab

You must open your Edit Page menu, then Manage Permissions and there choose your app from the Default landing tab list