Facebook same meta tags worked on one host and not worked on another [duplicate]

This question already has answers here: Closed 11 years ago.

Possible Duplicate:

How does Facebook Sharer select Images?

I use facebook debugger for test my page (http://developers.facebook.com/tools/debug). When I test this page - http://chatterbay-test.appspot.com/user/FlashMaster, debugger can'开发者_运维知识库t find any meta tags, but when I try test same code on another server - http://194.105.145.52:8080/wc/face.html debugger show title, description and image.

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That's because if you go to http://chatterbay-test.appspot.com/user/FlashMaster you need to sign in.

As such the debug tool can't read your page.