[libvirt-users] Can't plug usb device

Hi I'm trying to hotplug an usb device into kvm but the device is not attached this is the definition: cat kingston.xml <hostdev mode='subsystem' type='usb' managed='yes'> <source> <vendor id='0x1131' /> <product id='0x1001' /> </source> </hostdev> the attach and detach commands virsh attach-device ShadowFax kingston.xml El dispositivo fue asociado exitosamente virsh detach-device ShadowFax kingston.xml El dispositivo fue desmontado exitosamente which means the device is succesfully attached but is never seen in the vm The records in /var/log/messages: Sep 30 21:34:57 Balrog libvirtd: 21:34:57.288: warning : qemudParsePCIDeviceStrs:1411 : Unexpected exit status '1', qemu probably failed Sep 30 21:35:07 Balrog libvirtd: 21:35:07.803: warning : qemudParsePCIDeviceStrs:1411 : Unexpected exit status '1', qemu probably failed Sep 30 21:35:07 Balrog libvirtd: 21:35:07.805: error : qemuSecurityDACRestoreSecurityFileLabel:84 : cannot resolve symlink /dev/bus/usb/000/000: No such file or directory Sep 30 21:35:07 Balrog libvirtd: 21:35:07.806: warning : SELinuxRestoreSecurityFileLabel:371 : cannot resolve symlink /dev/bus/usb/000/000: No such file or directory Sep 30 21:35:07 Balrog libvirtd: 21:35:07.806: warning : qemudDomainDetachHostDevice:8930 : Failed to restore host device labelling from /var/log/libvirt/qemu/vm.log husb: open device 1.7 husb: config #1 need -1 husb: 3 interfaces claimed for configuration 1 husb: grabbed usb device 1.7 this one keeps repeating even after the device is detached that is today but yesterday showed only once or twice at each try and when detaching this came out: Warning: tried to detach unattached usb device USB Host Device Im using fedora 13 with: libvirt-0.8.2-1.fc13.x86_64 libvirt-client-0.8.2-1.fc13.x86_64 qemu-system-x86-0.12.5-1.fc13.x86_64 Can someone help me please Thanks