USB device cannot use in guest OS

[Crecy]

Hi all, I'm new here.

My host OS can perfectly use USB device, but it is not available in guest OS.


Background
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Host computer: acer notebook aspire V3-571G
Host OS: Windows 7
Guest OS: Ubuntu 10.04.2
Virtualbox version: 4.2.4

I try all i found solution:

install Extension pack --- done. version: 4.2.4r81684
set up USB filter --- add specific USB device filter, add blank USB filter, both above filter, all useless.So i set a blank filter.
plug or unplug in particular time and VBox will auto detect --- always no response.
manual install VBox USB driver --- useless. If uninstall device from host OS and prompt Vbox USB driver, Windows 7 will show blue screen.

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Use "Vboxmanage list usbhost" i found VBox can correctly detect USB device. No matter I Close VBox, run VBox, or run guest OS.

If VBox mount USB device, USB Current State will change "Captured" from "Busy".VBox also verify my WebCam and correctly active on guest OS.

It is all, guest OS still cannot detect other USB device.



Any idea about this situation? All suggests is appreciate. :'(