Error in Login With Twitter

No overload for method 'GetAccessToken' takes 3 arguments

No overload for method 'GetRequestToken' takes 2 arguments

OAuthTokenResponse RequestToken = OAuthUtility.GetRequestToken(consumerKey, consumerSecret);

Cannot implicitly convert type 'Twitterizer.OAuthTokenResponse' to 'OAuthTokenResponse'

protected void imgbtnTwitter_Click(object sender, ImageClickEventArgs e)
{
	//  bool condition = forceLoginCheckbox.Checked;
	//TwitterConsumer.StartSignInWithTwitter(condition).Send();
	// add these to web.config or your preferred location
	var consumerKey = ConfigurationManager.AppSettings["consumerKey"];
	var consumerSecret = ConfigurationManager.AppSettings["consumerSecret"];

	if (Request.QueryString["oauth_token"] == null)
	{
		//Step 1: Get Request Token
		OAuthTokenResponse RequestToken = OAuthUtility.GetRequestToken(consumerKey, consumerSecret);

		//Step 2: Redirect User to Requested Token
		Response.Redirect("http://twitter.com/oauth/authorize?oauth_token=" + RequestToken.Token);
	}
	else
	{
		//For Valid User
		string Oauth_Token = Request.QueryString["oauth_token"].ToString();

		var accessToken = OAuthUtility.GetAccessToken(consumerKey, consumerSecret, Oauth_Token);
	}
}