NDIS MUX driver Virtual miniport Installation problem

Hi,

I have a MUX intermediate driver and I need to install Virtual miniports using UI.
I am using SetupDixxx api for this. Problem is I can create 2 Virtual miniports easily, but when I try to create 3rd one, it fails.
Here is how i am creating VM.

SetupDiCreateDeviceInfoList (for creating NET class infolist)
SetupDiCreateDeviceInfo (create element)
SetupDiSetDeviceRegistryProperty (set HardwareID)
SetupDiCallClassInstaller (Transform the registry element into an actual devnode)

After this I call "UpdateDriverForPlugAndPlayDevices" with hardwareID and inf to install the actual adapter.

While installing 3rd adapter it fails.
Are there any known issues in Vista default co-installer.
I get following info in inf\setupapi.dev

I am stuck on this and any help on this will be really appreciated.

Thanks,
Ardneriv

{DIF_INSTALLDEVICE} 18:08:21.921
dvi: CoInstaller 1: Enter 18:08:21.921
cci: [NdisCoinst: Enter NcipHandleInstallPreProcessing]
cci: NdisCoinst: NetCfgInstanceId does not exist
cci: NdisCoinst: Guid of the adapter is {1DDCFC76-0182-48CB-850A-5EB3E1D4FF6E}
inf: Opened PNF: 'C:\Windows\INF\oem20.inf' ([strings] <src=oempath>)
cci: NdisCoinst: IfType from registry is 6
cci: NdisCoinst: IfType 6, Characteristics 0x21, IsIrdaDevice 0, PhysicalMediaType 0, MediaType 0, IsBridge 0, FoundGuidInDownlevel 0
cci: NdisCoinst: Connection name is Local Area Connection 94
cci: NdisCoinst: NetLuidIndex does not exist
cci: NdisCoinst: Allocated NetLuidIndex is 53
cci: NdisCoinst: NcipCreatePersistentInterface failed with error 0x1f
cci: NdisCoinst: Freeing the allocated NetLuid IfType 6 NetLuidIndex 53
cci: [NdisCoinst: Exit NcipHandleInstallPreProcessing]
!!! dvi: CoInstaller 1: failed(0x0000001f)!
!!! dvi: Error 31: A device attached to the system is not functioning.
dvi: {DIF_INSTALLDEVICE - exit(0x0000001f)} 18:08:21.968
!!! ndv: Error(0000001f) installing device!
ndv: Device install status=0x0000001f
ndv: Performing device install final cleanup...
! ndv: Queueing up error report since device installation failed...