Facebook and dotnetopenauth issue

We established an OpenID provider at BioSignID.com base on DotNetOpenAuth. (the authentication is base on signaturs with silverlight clien开发者_运维技巧t...) As we tried to login to facebook we encounter a problem with IE (6,7,8). In FF and Chrome the loggin process was fine.

On the server logs I can see the FB reqeust but the user somehow is NOT authenticated. In fiddler I can see that the authentication cookie not sent.

I've tried to transfer the server.aspx calls to https but then I cannot make the connection between my FB account and my BioSignId account.

Any ideas? Thanks

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I Resolve that. Even IE browsers send the session cookie so base on it I can check and Identify the user. Thanks