Vddk wrapper in C# gives VIX_E_INVALID_ARG ie.,"One of the parameters was invalid." error

Hi,

    I am using Vddk API to mount and manage vmdk files in C#. I am using a wrapper class from " http://communities.vmware.com/thread/193704?start=0&tstart=0 " to convert C# calls to C++ . When I try to connect to a remote vcenter server/esx host using  VixDiskLib_Connect, I get the Error Code :3 – VIX_E_INVALID_ARG  ie.,"One of the parameters was invalid.  A direct C++ connect call works. C# connect to local vmdk works as well.

C# program that calls the connect method:

using System;

using System.Runtime.InteropServices;

namespace Connect2VMwareServer2

{

    class Program

    {

        private static readonly uint VIXDISKLIB_FLAG_OPEN_READ_ONLY = 4;

        static void Main(string[] args)

        {

            string libDir="C:\\Program Files (x86)\\VMware\\VMware Virtual Disk Development Kit\\";

            ulong vixError = vixDisk.VixDiskLib_Init(1, 0, null, null, null, libDir);

            VixDiskLibConnectParams vxConParams = new VixDiskLibConnectParams();

            vxConParams.serverName = "192.168.11.40";

            vxConParams.port = 902;

            vxConParams.creds.uid.userName = "root";                   // UPDATE with good value

            vxConParams.creds.uid.password = "PASSOWRD";    // UPDATE with good value

            vxConParams.vmxSpec = "moRef=3";                             //UPDATE with good value, vm moid

            vxConParams.credType = VixDiskLibCredType.VIXDISKLIB_CRED_UID;

                IntPtr pConnection = IntPtr.Zero;

                vixError = vixDisk.VixDiskLib_Connect(vxConParams, ref pConnection);  // EXCEPTION OCCURS HERE ( ERROR CODE : 3 /14008)

       }

   }

}

I am stuck here terribly. Kindly suggest where I am going wrong. If I pass reference to vxConParams, I get the error "14008 – VIX_E_HOST_SERVER_NOT_FOUND ie., "The specified server could not be contacted.".

Regards,

Murugan