写了一个虚拟MODEM,安装有问题,帮看下INF文件

为什么用INF文件安装完后,设备参数项里没有PortName,AttachedTo项也没有值,这是为什么啊.
关于配置方面的我删除掉了,太长了

[Version]
Signature="$WINDOWS NT$"
Class=Modem
ClassGUID={4D36E96D-E325-11CE-BFC1-08002BE10318}
Provider=%Mfg%
DriverVer=05/18/2009,1.04.02
CatalogFile=muxvmodem.cat

[DestinationDirs]
DefaultDestDir = 12

[Manufacturer]
"Virtual Modem Types" = Generic

[ControlFlags]
ExcludeFromSelect=*

[Generic]
"Virtual Modem" = ModemX, COM\LEADCORE_MUXVMODEM&MODEM_01

[ModemX.NT]
CopyFiles = ModemX.NT.Copy
AddReg = All, MfgAddReg, ModemX.AddReg, INTERNAL

[ModemX.NT.HW]
AddReg = ModemX.NT.HW.AddReg

[ModemX.NT.Copy]
muxvmodem.sys

[ModemX.NT.HW.AddReg]
HKR, , "LowerFilters", 0x00010000, LEADCORE_MUXVMODEM_SERVICE

[ModemX.NT.Services]
AddService = LEADCORE_MUXVMODEM_SERVICE, 0x00000000, MUXVMODEM_SERVICE_INST

[MUXVMODEM_SERVICE_INST]
DisplayName    = "LEADCORE_MUXVMODEM_SERVICE"
ServiceType    = 1
StartType      = 3
ErrorControl   = 1
ServiceBinary  = %12%\muxvmodem.sys
LoadOrderGroup = Extended Base

[MUXVMODEM_LOGGING_INST]
AddReg = MUXVMODEM_LOGGING_INST_ADDREG

[MUXVMODEM_LOGGING_INST_ADDREG]
HKR,,EventMessageFile,0x00020000,"%%SystemRoot%%\System32\IoLogMsg.dll;%%SystemRoot%%\System32\drivers\muxvmodem.sys"
HKR,,TypesSupported,0x00010001,7

[SourceDisksNames]
1 = %COMPANY_NAME%"_"%PRODUCT_NAME%"_DRIVER",,,""

[SourceDisksFiles]
muxvmodem.sys = 1,,

[Strings]
mfg                ="KernelSword"
COMPANY_NAME       ="KernelSword"
PRODUCT_NAME       ="VMODEM"
CLASS_NAME         ="VMODEM"

[All]
;;;省略

[ModemX.AddReg]
;;;省略

[INTERNAL]
;;;省略

[EXTERNAL]
;;;省略

[MfgAddReg]
;;;省略