How to post on my facebook page from my website using Facebook App keys created from my facebook account?

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ASP.NET

API

Facebook-API

graph

Below is the code through with i am able successfully post it to my facebook wall from my website but i am not able to post to my facebook page.

var client = new FacebookClient();

                    dynamic token = client.Get("oauth/access_token", new
                    {
                        client_id = ConfigurationManager.AppSettings["FacebookAPI"].ToString(),
                        client_secret = ConfigurationManager.AppSettings["FacebookAPIKey"].ToString(),
                        grant_type = "client_credentials"
                    });
                    client.AccessToken = token.access_token;

                    dynamic parameters = new ExpandoObject();
                    parameters.title = detail.Title;
                    parameters.message = GetDescription(detail.Description, detail.Content);
                    parameters.link = "http://test.com/blog" + detail.RelativeLink;//HttpContext.Current.Request.IsLocal ? "http://test.com/blog" + detail.RelativeLink : HttpContext.Current.Request.Url.Authority + "" + detail.RelativeLink;

                    var result = client.Post(ConfigurationManager.AppSettings["FacebookPageID"].ToString() + "/feed", parameters);