[libvirt] fully virtualized xen guest question

Hi, I am running XEN on an debian etch. For clustering purposes I wanted to boot fedora as virtual machine. That works (except for nfs mounts) fine using the paravortualization features. But fully virtulalized guests do not even boot, I do not get any sensefull error message, my config file looks like: <domain type='xen'> <name>werewolf</name> <os> <type>hvm</type> <loader>/usr/lib/xen-3.0.3-1/boot/hvmloader</loader> <kernel>/data/virtual/kernel/kvm1/vmlinuz-2.6.18-6-amd64</kernel> <initrd>/data/virtual/kernel/kvm1/initrd.img-2.6.18-6-amd64</initrd> <cmdline>root=/dev/hda1</cmdline> </os> <memory>524M</memory> <vcpu>1</vcpu> <devices> <emulator>/usr/bin/kvm</emulator> <disk type='file'> <source file='/tmp/werewolf.img.plb13810'/> <target dev='hda1' bus='xen'/> </disk> <interface type='bridge'> <source bridge='virbr1'/> </interface> </devices> <features> <acpi/> </features> </domain> <domain type='xen'> <name>werewolf</name> <os> <type>hvm</type> <loader>/usr/lib/xen-3.0.3-1/boot/hvmloader</loader> <kernel>/data/virtual/kernel/kvm1/vmlinuz-2.6.18-6-amd64</kernel> <initrd>/data/virtual/kernel/kvm1/initrd.img-2.6.18-6-amd64</initrd> <cmdline>root=/dev/hda1</cmdline> </os> <memory>524M</memory> <vcpu>1</vcpu> <devices> <emulator>/usr/bin/kvm</emulator> <disk type='file'> <source file='/tmp/werewolf.img.plb13810'/> <target dev='hda1' bus='xen'/> </disk> <interface type='bridge'> <source bridge='virbr1'/> </interface> </devices> <features> <acpi/> </features> </domain> all I get when tryin virsh create is: xend_post: error from xen daemon: (xend.err "Error creating domain: (0, 'Error')") Whats wrong?