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

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

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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

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