CRM 2011 connect to organization.svc using C#

Question

The CRM 2011 is setup with ADFS and HTTPS. I'm trying to connect to organization.svc from custom web page which sits on the same IIS with CRM 2011 but as a different web site using this code:

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);
}

It returns error message:

An unsecured or incorrectly secured fault was received from the other party. See the inner FaultException for the fault code and detail.ID3242: The security token could not be authenticated or authorized.

and in the event viewer I see error:

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

although I give the correct user name and password..

and if I try to replace:

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

with:

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

it returns:

Object reference not set to an instance of an object.

because serviceProxy is null.

Answer 1

I've finally figured it out :)

I was missing the "/organization", meaning the organizationUri should be:

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

I've figured it out when I used this code:

IDiscoveryService discoveryService = new DiscoveryServiceProxy(discoveryUri, null, userCredentials, null);

            RetrieveOrganizationRequest orgRequest =
                                        new RetrieveOrganizationRequest()
                                        {
                                            UniqueName = "organization name",
                                            AccessType = EndpointAccessType.Default,
                                            Release = OrganizationRelease.Current
                                        };
            RetrieveOrganizationResponse org =
                    (RetrieveOrganizationResponse)discoveryService.Execute(orgRequest);

And saw the endpoins that the organization have include the "/organization" in the Uri..