Facebook API, ASP.NET , Post to wall

I'm trying to figure out how to post an image to a users wall with Facebook graph API and ASP.NET.

I have tried something like this code : http://osnapz.wordpress.com/2010/04/23/using-asp-net-with-facebooks-graph-api-and-oauth-2-0-authentication/

I've tried this to se if it is working with a simple message:

string url = "https://graph.facebook.com/me/feed?access_token=" + oAuth.Token;
 string json = oAuth.WebRequest(oAuthFacebook.Method.POST, url, "message="  +HttpUtility.UrlEncode("Test"));

It posted a message to my wall. One time. And then I get these warnings from the Facebook debugger:

Could not follow redirect : URL requested a HTTP redirect, but it could not be followed.

Missing Required Property: The 'og:url' property is required, but not present.

Missing Required Property: The 'og:type' property is required, but not present.

Missing Required Property: The 'og:title' property is required, but not present.

How can I set the properties?

Facebook API, ASP.NET , Post to wall

Facebook API, ASP.NET , Post to wall

Re: Facebook API, ASP.NET , Post to wall