Pegar serial logico HD no windows vista ...

Bom dia
Pessoal estou com o seguinte problema , tenho a função abaixo que pegao o serial fisico do hd no windows 95,98,2000,xp ... so que na minha maquina eu tenho windows vista e esta função não funciona no windows vista ... el simplismente não retorna nada ... nos outros windows citados acima ela retorna o serial do hd ok ....

Alguem sabe o pq que nao funciona no windows vista e pode me ajugar ???

{ função que pega o serial number FÍSICO do HD e retorna string }
function DadosDisco(nPort:string; nPos:Byte):String;
type
TSrbIoControl=packed record
HeaderLength:ULONG;
Signature:Array[0..7]of Char;
Timeout:ULONG;
ControlCode:ULONG;
ReturnCode:ULONG;
Length:ULONG;
end;
SRB_IO_CONTROL=TSrbIoControl;
PSrbIoControl=^TSrbIoControl;
TIDERegs=packed record
bFeaturesReg:Byte; // especificar ´comandos´ SMART
bSectorCountReg:Byte; // registro de contador de setor
bSectorNumberReg:Byte; // registro de número de setores
bCylLowReg:Byte; // valor de cilindro (byte mais baixo)
bCylHighReg:Byte; // valor de cilindro (byte mais alto)
bDriveHeadReg:Byte; // registro de drive/cabeça
bCommandReg:Byte; // comando IDE
bReserved:Byte; // reservado- tem que ser zero
end;
IDEREGS=TIDERegs;
PIDERegs=^TIDERegs;
TSendCmdInParams=packed record
cBufferSize:DWORD;
irDriveRegs:TIDERegs;
bDriveNumber:Byte;
bReserved:Array[0..2]of Byte;
dwReserved:Array[0..3]of DWORD;
bBuffer:Array[0..0]of Byte;
end;
SENDCMDINPARAMS=TSendCmdInParams;
PSendCmdInParams=^TSendCmdInParams;
TIdSector=packed record
wGenConfig:Word;
wNumCyls:Word;
wReserved:Word;
wNumHeads:Word;
wBytesPerTrack:Word;
wBytesPerSector:Word;
wSectorsPerTrack:Word;
wVendorUnique:Array[0..2]of Word;
sSerialNumber:Array[0..19]of Char;
wBufferType:Word;
wBufferSize:Word;
wECCSize:Word;
sFirmwareRev:Array[0..7]of Char;
sModelNumber:Array[0..39]of Char;
wMoreVendorUnique:Word;
wDoubleWordIO:Word;
wCapabilities:Word;
wReserved1:Word;
wPIOTiming:Word;
wDMATiming:Word;
wBS:Word;
wNumCurrentCyls:Word;
wNumCurrentHeads:Word;
wNumCurrentSectorsPerTrack:Word;
ulCurrentSectorCapacity:ULONG;
wMultSectorStuff:Word;
ulTotalAddressableSectors:ULONG;
wSingleWordDMA:Word;
wMultiWordDMA:Word;
bReserved:Array[0..127]of Byte;
end;
PIdSector=^TIdSector;

const
IDE_ID_FUNCTION=$EC;
IDENTIFY_BUFFER_SIZE=512;
DFP_RECEIVE_DRIVE_DATA=$0007c088;
IOCTL_SCSI_MINIPORT=$0004d008;
IOCTL_SCSI_MINIPORT_IDENTIFY=$001b0501;
DataSize=sizeof(TSendCmdInParams)-1+IDENTIFY_BUFFER_SIZE;
BufferSize=SizeOf(SRB_IO_CONTROL)+DataSize;
W9xBufferSize=IDENTIFY_BUFFER_SIZE+16;
var
hDevice:THandle;
cbBytesReturned:DWORD;
pInData:PSendCmdInParams;
pOutData:Pointer; // PSendCmdOutParams
Buffer:Array[0..BufferSize-1]of Byte;
srbControl:TSrbIoControl absolute Buffer;

begin
Result:=´´;
FillChar(Buffer,BufferSize,#0);
// Windows NT, Windows 2000, Windows XP
if Win32Platform=VER_PLATFORM_WIN32_NT then begin
// recuperar handle da porta SCSI {hDevice:=CreateFile(´\\.\SCSI0:´,}
// Nota: ´\\.\C:´ precisa de privilégios administrativos
hDevice:=CreateFile(pchar(´\\.\SCSI´+nPort+´:´),
GENERIC_READ or GENERIC_WRITE,FILE_SHARE_READ or FILE_SHARE_WRITE,
nil,OPEN_EXISTING,0,0);
if hDevice=INVALID_HANDLE_VALUE then Exit;
try
srbControl.HeaderLength:=SizeOf(SRB_IO_CONTROL);
System.Move(´SCSIDISK´,srbControl.Signature,8);
srbControl.Timeout:=2;
srbControl.Length:=DataSize;
srbControl.ControlCode:=IOCTL_SCSI_MINIPORT_IDENTIFY;
pInData:=PSendCmdInParams(PChar(@Buffer)+SizeOf(SRB_IO_CONTROL));
pOutData:=pInData;
with pInData^ do begin
cBufferSize:=IDENTIFY_BUFFER_SIZE;
bDriveNumber:=nPos; {Observar aqui! posição mestre ou escravo }
with irDriveRegs do begin
bFeaturesReg:=0;
bSectorCountReg:=1;
bSectorNumberReg:=1;
bCylLowReg:=0;
bCylHighReg:=0;
bDriveHeadReg:=$A0;
bCommandReg:=IDE_ID_FUNCTION;
end;
end;
if not DeviceIoControl(hDevice,IOCTL_SCSI_MINIPORT,@Buffer,
BufferSize,@Buffer,BufferSize,cbBytesReturned,nil)then Exit;
finally CloseHandle(hDevice); end;
end
else begin
// Windows 95 OSR2, Windows 98, Windows ME
hDevice:=CreateFile( ´\\.\SMARTVSD´,0,0, nil,CREATE_NEW,0,0 );
if hDevice=INVALID_HANDLE_VALUE then Exit;
try
pInData:=PSendCmdInParams(@Buffer);
pOutData:=@pInData^.bBuffer;
with pInData^ do begin
cBufferSize:=IDENTIFY_BUFFER_SIZE;
bDriveNumber:=nPos; {Observar aqui! posição mestre ou escravo }
with irDriveRegs do begin
bFeaturesReg:=0;
bSectorCountReg:=1;
bSectorNumberReg:=1;
bCylLowReg:=0;
bCylHighReg:=0;
bDriveHeadReg:=$A0;
bCommandReg:=IDE_ID_FUNCTION;
end;
end;
if not DeviceIoControl(hDevice,DFP_RECEIVE_DRIVE_DATA,pInData,
SizeOf(TSendCmdInParams)-1,pOutData,W9xBufferSize,cbBytesReturned,nil)then Exit;
finally CloseHandle(hDevice); end;
end;
{with PIdSector(PChar(pOutData)+16)^ do begin
ChangeByteOrder(sSerialNumber,SizeOf(sSerialNumber));
SetString(Result,sSerialNumber,SizeOf(sSerialNumber));
end;}
with PIdSector(PChar(pOutData)+16)^ do begin
ChangeByteOrder(sModelNumber,SizeOf(sModelNumber));
Result:=Trim(sModelNumber);
ChangeByteOrder(sSerialNumber,SizeOf(sSerialNumber));
Result:=Result+´/´+Trim(sSerialNumber);
ChangeByteOrder(sFirmwareRev,SizeOf(sFirmwareRev));
Result:=Result+´/´+Trim(sFirmwareRev);
end;
end;

procedure TForm1.FormCreate(Sender: TObject);
var a:Integer;
begin
ListBox1.Clear;
for a:=0 to 5 do begin
ListBox1.Items.Add(´Posição: ´+IntToStr(a));
ListBox1.Items.Add(´ Mestre: ´+Trim(DadosDisco(IntToStr(a),0)));
ListBox1.Items.Add(´ Escravo: ´+Trim(DadosDisco(IntToStr(a),1)));
ListBox1.Items.Add(´´);
end;
end;

Desde ja agradeço ,