wince6.0 mass storage device

我的USBFN通过ActiveSync相连没有问题，但是换成mass storage就会出现问题。USBFN接入电脑任务栏很快出现U盘的图标，但是隔一分钟才在“我的电脑”里出现“可移动磁盘”图标，但是一直不能访问里面的内容。我的SD卡在系统里面的分区为“DSK2”，SD卡图标在WINCE系统里面不停闪动，USBFN驱动不断打印RESET信息。不知问题出在那里，那位大哥给点指导意见，谢谢！
我的注册表设置如下：
[HKEY_LOCAL_MACHINE\Drivers\USB\FunctionDrivers]
"DefaultClientDriver"=- ; erase previous default
[HKEY_LOCAL_MACHINE\Drivers\USB\FunctionDrivers]
"DefaultClientDriver"="Mass_Storage_Class"

[HKEY_LOCAL_MACHINE\Drivers\USB\FunctionDrivers\Mass_Storage_Class]
"Dll"="usbmsfn.dll"
"InterfaceSubClass"=dword:06
"InterfaceProtocol"=dword:50
"DeviceName"="DSK2:"     ；SD卡分区
"FriendlyName"="Mass Storage"
; idVendor must be changed. 045E belongs to Microsoft and is only to be used for
; prototype devices in your labs. Visit http://www.usb.org to obtain a vendor id.
"idVendor"=dword:1286
"Manufacturer"="Generic Manufacturer (PROTOTYPE--Remember to change idVendor)"
"idProduct"=dword:FFFF
"Product"="Generic Mass Storage (PROTOTYPE--Remember to change idVendor)"
"bcdDevice"=dword:0
"Removable"=dword:1

自己顶一下