[ubuntu] failed to access the usb subsystem

After reviewing this thread:

http://ubuntuforums.org/showthread.p...&highlight=usb


I still can't get virtualbox to recognize the USB's. I have followed the directions to include my user in the 'vboxusers' group. Here is the error:




failed to access the usb subsystem


Virtualbox is not currently allowed to access USB devices. You can change this by adding your user to the "vboxusers" group.



p, li { white-space: pre-wrap; } Result Code:
NS_ERROR_FAILURE (0x00004005)
Component:
Host
Interface:
IHost {30678943-32df-4830-b413-931b25ac86a0}
Callee:
IMachine {22781af3-1c96-4126-9edf-67a020e0e858}