Q: USB devices are not available in VirtualBox

[Space Walker <dreamer.space@gmail.com>]

Hi,

I hit the wall and looking for help with VirtualBox in Debian. Search in 
google gave many links and I tried quite a few solutions described but 
no go.

Installed
-----------------------------------
Debian 5.0 lenny
Sun VirtualBox ver 3.0.4
Guest OS: Windows XP

/etc/fstab
none /proc/bus/usb  usbfs  
auto,busguid=122,busmode=0775,devgid=116,devmode=0664  0  0

/etc/group
vboxusers:x:116:username

I followed instruction and registered two USB filters in configuration 
software. But once Guest OS started USB devices are grayed out and not 
available.

USB device automatically recognized by debian and mounted. User is able 
to read/write to device from linux but not from Windows.

I would appreciate any hint(s) to where look for a fix.

Thanks,
Andy