CRM 2011使用C连接到组织.svc#

CRM 2011是通过ADFS和HTTPS设置的。我正在尝试从自定义网页连接到organization.svc,该网页位于CRM 2011的同一IIS上,但使用以下代码作为不同的网站:

OrganizationServiceProxy serviceProxy;
ClientCredentials clientCredentials = new ClientCredentials();
clientCredentials.UserName.UserName = "admin";
clientCredentials.UserName.Password = "pass";

Guid contactId = Guid.Empty;

Uri OrganizationUri = new Uri(String.Format("https://organization.crmdev.com:port/XRMServices/2011/Organization.svc"));

Uri HomeRealmUri = new Uri(String.Format("https://organization.crmdev.com:port/XRMServices/2011/Discovery.svc"));

using (serviceProxy = new OrganizationServiceProxy(OrganizationUri, null, clientCredentials, null))
{
    serviceProxy.ServiceConfiguration.CurrentServiceEndpoint.Behaviors.Add(new ProxyTypesBehavior());
    IOrganizationService service = (IOrganizationService)serviceProxy; 
    Entity contact = new Entity("contact");
    contact.Attributes["lastname"] = "oi oi";
    contactId = service.Create(contact);
}

它返回错误消息:

从另一方收到无担保或担保不正确的过失。有关故障代码和详细信息,请参阅内部FaultException。ID3242:无法对安全令牌进行身份验证或授权。

在事件查看器中,我看到错误:

Account For Which Logon Failed:
    Security ID:        NULL SID
    Account Name:       admin
    Account Domain: 
Failure Reason:     Unknown user name or bad password.

尽管我提供了正确的用户名和密码。。

如果我试图替换:

using (serviceProxy = new OrganizationServiceProxy(OrganizationUri, null, clientCredentials, null))

与:

using (serviceProxy = new OrganizationServiceProxy(OrganizationUri, HomeRealUri, clientCredentials, null))

它返回:

对象引用未设置为对象的实例。

因为serviceProxy为null。