"failed to created a proxy device for the usb device" message when attaching USB dongle to guest

[Alexey Korepov]

I have using Virtualbox on Debian Lenny (Squeeze) AMD64 as host and Windows XP as guest. All USB flash drives, mouse, keyboard succcesfully connects from host to guest via Virtualbox. But I have a hardware VPN key (AMICON VPNLDR 1.5 device) that connects to Windows XP as host normally, succesfully connects to guest via any virtualbox on Ubuntu Jaunty, but I can't connect it on Debian Lenny (that is installed on server, Ubuntu - on client computers).

When I insert this device, in messages I see:

Oct  9 16:00:57 beam kernel: [103940.864726] usb 4-2: new full speed USB device using ohci_hcd and address 4
Oct  9 16:00:58 beam kernel: [103941.077039] usb 4-2: New USB device found, idVendor=a420, idProduct=5420
Oct  9 16:00:58 beam kernel: [103941.077042] usb 4-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Oct  9 16:00:58 beam kernel: [103941.077045] usb 4-2: Product: VPNLDR 1.5
Oct  9 16:00:58 beam kernel: [103941.077047] usb 4-2: Manufacturer: AMICON
Oct  9 16:00:58 beam kernel: [103941.077133] usb 4-2: configuration #1 chosen from 1 choice

When I start the guest and try connect this device to it, the Virtualbox interface hang to about 8-10 seconds and after that I see the error:

Failed to attach the USB device AMICON VPNLDR 1.5 [0100] to the virtual machine oldlinux_image.
Failed to create a proxy device for the USB device. (Error: VERR_READ_ERROR).
Details:

Result Code: NS_ERROR_FAILURE (0x80004005)
Component: Console
Interface: IConsole {0a51994b-cbc6-4686-94eb-d4e4023280e2}

And after that device stay disconnected. In VBox.log I see the error:

00:07:39.487 ERROR [COM]: aRC=NS_ERROR_FAILURE (0x80004005) aIID={0a51994b-cbc6-4686-94eb-d4e4023280e2} aComponent={Console} aText={Failed to create a proxy device for the USB device.  (Error: VERR_READ_ERROR)} aWarning=false, preserve=false

I try to start virtualbox via normal user, priveleged user (in group root, adm, sudo, ...) and via root, but always see this error. I try to create filters for this device, but it isn't helps.

This device is a hardware VPN key for the Sberbank Client Bank software, that is very popular in Russia and many of organisation use it.

How can I fix the problem? Which folders, files or processes is depend on virtualbox mount process?