Win Ce5 Usb Problem

when it resume from power off mode,usb can't be used,i don't know why

i try..

[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\OHCI]
    "HcdCapability"=dword:4 ; 4 = HCD_SUSPEND_ON_REQUEST

(If the processor supports USB resume HcdCapability should be = 1,
HCD_SUSPEND_RESUME.)

"HCD_SUSPEND_RESUME"=dword:1
"HCD_SUSPEND_ON_REQUEST"=dword:4
"HcdCapability"=dword:4


Help Me....