virtualbox.org

Strange thing happened to me:
I have well working XP(if I could say that about XP:) system running in Vbox 1.6.4 - all was working well until one day most of my USB devices grayed out in Devices->USB Devices menu. Strange thing is that my HP Photosmart 7260 (first in the list) isn't grayed out!
I have no device filters in machine's settings and I did no changes in Vbox config in any way. I tried to connect device I want to use through virtual machine's settings (filter) without any effect.
Any suggestions?

I have the same problem except that all my usb devices are grayed out. I uncommented the lines in the mountdevsubfs.sh file for USB to work and rebooted but no change. I'm also using 1.6.4