My AC97 not install why?

[lukyman]

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[unattended]

UnattendMode=FullUnattended

OemSkipEula=Yes

OemPreinstall=Yes

TargetPath=\WINDOWS

Repartition=No

UnattendSwitch="Yes"

WaitForReboot="No"

CrashDumpSetting=0

Hibernation="No"

NtUpgrade=No

OEMPnPDriversPath="DRIVERS\AUDIO"<---------not work

DriverSigningPolicy=Ignore<-----------------------not work

[GuiUnattended]

AdminPassword=*

EncryptedAdminPassword=No

AutoLogon=Yes

AutoLogonCount=1

OEMSkipRegional=1

TimeZone=220

OemSkipWelcome=1

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i setup XP SP2.......it can not work but sp1 can work why

who can help me !!