How to skip Facebook Device recognition with httpRequest

See more:

C#

Facebook-API

I have problem in fetching Facebook with httpRrequest.
as i fetch facebook with this :
http://stackoverflow.com/questions/8425593/c-sharp-httpwebrequest-post-login-to-facebook[^]

bu facebook say:
We don't recognize the device you're using. Please answer a few security questions to keep your account safe.
and dont let me to fetch.
any body have solution for it?
Please help me, how to fetch facebook with httprequest.
regard