PowerOn VM failse with error 3008-Cannot connect to the virtual machine

Hello,

(I am sorry about my English) I am using VIX1.11 to start VM on ESXi5.0 host. The PowerOn() has always been failing for me with error "3008 Cannot connect to the virtual machine".However the VM still Power On. I also looked up some discussions already on this site but it just wont work for me. Could you please help me get it working?.

My code as bellow:

               //connec to esxi5.0 - work well

               //open vm - work well

               job = host.RegisterVM(vmPath, null);

                err = job.WaitWithoutResults();

                if (lib.ErrorIndicatesFailure(err))

                {

                    ;

                }

                job = host.OpenVM(vmPath, null);

                err = job.Wait(new int[] { VixCOM.Constants.VIX_PROPERTY_JOB_RESULT_HANDLE },

                               ref Results);

                if (lib.ErrorIndicatesFailure(err))

                {

                    ;

                }

                IVM2 vm = (VixCOM.IVM2)((object[])Results)[0];

               //start vm - work with error 3008

               job = vm.PowerOn(VixCOM.Constants.VIX_VMPOWEROP_LAUNCH_GUI, null, null);

                err = job.WaitWithoutResults();

                if (lib.ErrorIndicatesFailure(err))

                {

                    ;

                }