How to access Service bus 1.1 message queue from windows Service running in "local service"

I have set up a Service bus 1.1 for windows server and trying to access it using the following code.

 var sbUriList = new List<Uri>() { new UriBuilder { Scheme = "sb", Host = ServerFQDN, Path = ServiceNamespace }.Uri };
    var httpsUriList = new List<Uri>() { new UriBuilder { Scheme = "https", Host = ServerFQDN, Path = ServiceNamespace, Port = HttpPort }.Uri };

    NetworkCredential credential = new NetworkCredential("<User Name>", "<Password>", "<Domain>");

    ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback((s, cert, chain, ssl) => { return true; });

    TokenProvider tokenProvider = TokenProvider.CreateOAuthTokenProvider(httpsUriList, credential);
    messageFactory = MessagingFactory.Create(sbUriList, tokenProvider);



    ServiceBusConnectionStringBuilder connBuilder = new ServiceBusConnectionStringBuilder();
    connBuilder.ManagementPort = HttpPort;
    connBuilder.RuntimePort = TcpPort;
    connBuilder.Endpoints.Add(new UriBuilder() { Scheme = "sb", Host = ServerFQDN, Path = ServiceNamespace }.Uri);
    connBuilder.StsEndpoints.Add(new UriBuilder() { Scheme = "https", Host = ServerFQDN, Port = HttpPort, Path = ServiceNamespace }.Uri);

    namespaceManager = NamespaceManager.CreateFromConnectionString(connBuilder.ToString());

if (!namespaceManager.QueueExists(queuename))
{
    namespaceManager.CreateQueue(queuename);
}

this works fine if i run my code from a console application, but however if I put this in a windows service and run it under either a Local service or Local System the code throws the following exception while trying to check if the queue exists in the following line 

namespaceManager.CreateQueue(queuename);

Unexpected exception : System.UnauthorizedAccessException: The remote server returned an error: (401) Unauthorized. Manage claim is required for this operation..TrackingId:5be1365e-b4ae-4555-b81b-dcbef96be9d0_GIE11LT32PD622,TimeStamp:4/19/2015 3:51:28 PM ---> System.Net.WebException: The remote server returned an error: (401) Unauthorized.
   at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
   at Microsoft.ServiceBus.Messaging.ServiceBusResourceOperations.GetAsyncResult`1.<GetAsyncSteps>b__2d(GetAsyncResult`1 thisPtr, IAsyncResult r)
   at Microsoft.ServiceBus.Messaging.IteratorAsyncResult`1.StepCallback(IAsyncResult result)
   --- End of inner exception stack trace ---

Can someone help me understand how I can run my code as a windows service in either a "Local Service" or "Local System" and still be able to access the queue and post my messages.