[libvirt-users] error deploying a vm: Operation not permitted

Dear Ladies and Gentleman, I am trying to deploy a virtual machine on a KVM host. I created a deployment file (see beneath) and a disk for this VM. As root I executed the following command: virsh create deployment.0 but then I get the following error message: error: Failed to create domain from deployment.0 error: cannot set ownership on /var/lib/one/datastores/0/15/disk.0: Operation not permitted What am I doing wrong? Thanks in advance. Best regards Michael Rebstock ######################### Content of the deployment file: <domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'> <name>one-15</name> <memory>2097152</memory> <os> <type arch='i686'>hvm</type> <boot dev='hd'/> </os> <devices> <emulator>/usr/bin/kvm</emulator> <disk type='file' device='disk'> <source file='/var/lib/one/datastores/0/15/disk.0'/> <target dev='hda' bus='ide'/> <driver name='qemu' type='raw' cache='default'/> </disk> <interface type='bridge'> <source bridge='319er-vlan'/> <mac address='22:00:c0:ba:2a:64'/> </interface> </devices> <features> <acpi/> </features> </domain>