System.ServiceModel.CommunicationException: The service endpoint failed to listen on the URI 'net.tcp://localhost:5400/Agent/384' because access was denied.  Verify that the current user is granted access in the appropriate allowAccounts section of SMSvcHost.exe.config. ---> System.ComponentModel.Win32Exception: Access is denied
   at System.ServiceModel.Activation.SharedMemory.Read(String name, String& content)
   at System.ServiceModel.Channels.SharedConnectionListener.SharedListenerProxy.ReadEndpoint(String sharedMemoryName, String& listenerEndpoint)

private static ImpersonationResult ImpersonateUser(string domain, string username, string password)
{
    IntPtr token = IntPtr.Zero;
    IntPtr primaryToken = IntPtr.Zero;

    try
    {
        // Get token
        bool bImpersonated = LogonUser(
            username,
            domain,
            password,
            (int)LogonType.NetworkClearText,
            (int)LogonProvider.Default,
            ref token);

        if (!bImpersonated)
        {
            throw new Exception(string.Format("Failed to impersonate identity. Error code: {0}", Marshal.GetLastWin32Error()));
        }

        SecurityDescriptor sd = new SecurityDescriptor();
        IntPtr ptr = Marshal.AllocCoTaskMem(Marshal.SizeOf(sd));
        Marshal.StructureToPtr(sd, ptr, false);
        InitializeSecurityDescriptor(ptr, 1);
        sd = (SecurityDescriptor)Marshal.PtrToStructure(ptr, typeof(SecurityDescriptor));

        // Set up security
        bool bDecriptorSet = SetSecurityDescriptorDacl(
            ref sd,
            true,
            IntPtr.Zero,
            false);

        if (!bDecriptorSet)
        {
            throw new Exception(string.Format("Failed to set security descriptor. Error code: {0}", Marshal.GetLastWin32Error()));
        }

        SecurityAttributes processAttributes = new SecurityAttributes();
        processAttributes.lpSecurityDescriptor = ptr;
        processAttributes.nLength = (uint)Marshal.SizeOf(sd);
        processAttributes.bInheritHandle = true;

        // Duplicate token
        bool bTokenDuplicated = DuplicateTokenEx(
            token,
            0,
            ref processAttributes,
            (int)SecurityImpersonationLevel.SecurityImpersonation,
            (int)TokenType.TokenPrimary,
            ref primaryToken);

        if (!bTokenDuplicated)
        {
            throw new Exception(string.Format("Failed to duplicate identity token. Error code: {0}", Marshal.GetLastWin32Error()));
        }

        SecurityAttributes threadAttributes = new SecurityAttributes();
        threadAttributes.lpSecurityDescriptor = IntPtr.Zero;
        threadAttributes.nLength = 0;
        threadAttributes.bInheritHandle = false;

        // Got the token
        return new ImpersonationResult()
            {
                Token = primaryToken,
                ProcessAttributes = processAttributes,
                ThreadAttributes = threadAttributes
            };
    }
    finally
    {
        FreeToken(token);
    }
}

private static void FreeToken(IntPtr token)
{
    if (token != IntPtr.Zero)
    {
        CloseHandle(token);
    }
}

<configuration>
  <system.serviceModel.activation>
   <net.tcp listenBacklog="16" <!—16 * # of processors -->
      maxPendingAccepts="4"<!— 4 * # of processors -->
      maxPendingConnections="100"
      receiveTimeout="00:00:30" <!—30 seconds -->
      teredoEnabled="false">
      <allowAccounts>
         <!-- LocalSystem account -->
         <add securityIdentifier="S-1-5-18"/>
         <!-- LocalService account -->
         <add securityIdentifier="S-1-5-19"/>
         <!-- Administrators account -->
         <add securityIdentifier="S-1-5-20"/>
         <!-- Network Service account -->
         <add securityIdentifier="S-1-5-32-544" />
         <!-- IIS_IUSRS account (Vista only) -->
         <add securityIdentifier="S-1-5-32-568"/>
       </allowAccounts>
   </net.tcp>
 </system.serviceModel.activation>

C:Windowssystem32>net user Administrator /active:yes