How to Fetch Data from Dynamic CRM 2011 using web service and c#: On-premise?

I am trying to fetch data from MS dynamic CRM 2011 on following environment

1. Dynamic CRM 2011 On-premise using Windows authentication.
2. Microsoft.crm.sdk.dll and microsoft.crm.sdktypeproxy.dll references.
3. C# .NET Windows Form visual studio 2012

I have been getting the following MSDN resources.

1. http://msdn.microsoft.com/en-us/library/bb959412.aspx

                    CrmAuthenticationToken token = new CrmAuthenticationToken();
                // You can use enums.cs from the SDK\Helpers folder to get the enumeration for Active Directory authentication.
                token.AuthenticationType =0;
                //token.OrganizationName = "AdventureWorksCycle";
                token.OrganizationName = "CRM4";

                CrmService service = new CrmService();
                service.Url = "http://servername:5555/XRMServices/2011/Discovery.svc?wsdl";
                service.CrmAuthenticationTokenValue = token;
                //service.Credentials = System.Net.CredentialCache.DefaultCredentials;
                System.Net.NetworkCredential network = new System.Net.NetworkCredential
                {
                    UserName = "username",
                    Password = "password",
                    Domain = "domainname"
                };


                // Prepare Query One
                string fetch1 = @"<fetch mapping='logical'><entity name='account'><attribute name=""ownerid""/>  <attribute name=""name""/><attribute name=""new_onholdstatus""/><link-entity name='systemuser' to='owninguser'><attribute name='systemuserid'/><attribute name='domainname' /><attribute name='fullname' /></link-entity></entity></fetch>";

                // Fetch the results.
                ExecuteFetchRequest req = new ExecuteFetchRequest();
                req.FetchXml = fetch1;                
                ExecuteFetchResponse result1 = (ExecuteFetchResponse)service.Execute(req);

It is throwing the following error below.

   at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
   at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
   at Microsoft.Crm.SdkTypeProxy.CrmService.Execute(Request Request)

any help would be appreciated, I also need to find how to pass Windows authentication it is normal network login for the on-premise CRM

Mant thanks 

Prabir