euca-run-instances fails to run VM

I tried to run VM with the docs,
http://wiki.openstack.org/NovaInstall
and
http://github.com/vishvananda/novascript
the docs say using screen tools, but I tried with nohup and saved all the logs to files for error tracking.

anyway, failed when runnig euca-run-instances.

The nova-compute log messages is as follows:
===============================================
libvir: QEMU error : internal error process exited while connecting to monitor: chardev: opening backend "file" failed
ERROR:root:instance i-wt4mcqm1: Failed to spawn
Traceback (most recent call last):
  File "/root/openstack/nova/nova/compute/manager.py", line 86, in run_instance
    yield self.driver.spawn(instance_ref)
  File "/usr/lib/python2.6/dist-packages/twisted/internet/defer.py", line 823, in _inlineCallbacks
    result = g.send(result)
  File "/root/openstack/nova/nova/virt/libvirt_conn.py", line 218, in spawn
    yield self._conn.createXML(xml, 0)
  File "/usr/lib/python2.6/dist-packages/libvirt.py", line 1289, in createXML
    if ret is None:raise libvirtError('virDomainCreateXML() failed', conn=self)
libvirtError: internal error process exited while connecting to monitor: chardev: opening backend "file" failed

2010-10-06 00:13:04+0900 [-] (root): ERROR instance i-wt4mcqm1: Failed to spawn
2010-10-06 00:13:04+0900 [-] Traceback (most recent call last):
2010-10-06 00:13:04+0900 [-] File "/root/openstack/nova/nova/compute/manager.py", line 86, in run_instance
2010-10-06 00:13:04+0900 [-] yield self.driver.spawn(instance_ref)
2010-10-06 00:13:04+0900 [-] File "/usr/lib/python2.6/dist-packages/twisted/internet/defer.py", line 823, in _inlineCallbacks
2010-10-06 00:13:04+0900 [-] result = g.send(result)
2010-10-06 00:13:04+0900 [-] File "/root/openstack/nova/nova/virt/libvirt_conn.py", line 218, in spawn
2010-10-06 00:13:04+0900 [-] yield self._conn.createXML(xml, 0)
2010-10-06 00:13:04+0900 [-] File "/usr/lib/python2.6/dist-packages/libvirt.py", line 1289, in createXML
2010-10-06 00:13:04+0900 [-] if ret is None:raise libvirtError('virDomainCreateXML() failed', conn=self)
2010-10-06 00:13:04+0900 [-] libvirtError: internal error process exited while connecting to monitor: chardev: opening backend "file" failed
2010-10-06 00:13:04+0900 [-]
libvir: QEMU error : Domain not found: no domain with matching name 'i-wt4mcqm1'
2010-10-06 00:13:04+0900 [-] Unhandled error in Deferred:
2010-10-06 00:13:04+0900 [-] Unhandled Error
        Traceback (most recent call last):
          File "/usr/lib/python2.6/dist-packages/twisted/internet/defer.py", line 307, in errback
            self._startRunCallbacks(fail)
          File "/usr/lib/python2.6/dist-packages/twisted/internet/defer.py", line 354, in _startRunCallbacks
            self._runCallbacks()
          File "/usr/lib/python2.6/dist-packages/twisted/internet/defer.py", line 371, in _runCallbacks
            self.result = callback(self.result, *args, **kw)
          File "/usr/lib/python2.6/dist-packages/twisted/internet/defer.py", line 879, in gotResult
            _inlineCallbacks(r, g, deferred)
        --- <exception caught here> ---
          File "/usr/lib/python2.6/dist-packages/twisted/internet/defer.py", line 821, in _inlineCallbacks
            result = result.throwExceptionIntoGenerator(g)
          File "/usr/lib/python2.6/dist-packages/twisted/python/failure.py", line 338, in throwExceptionIntoGenerator
            return g.throw(self.type, self.value, self.tb)
          File "/root/openstack/nova/nova/compute/manager.py", line 98, in run_instance
            self._update_state(context, instance_id)
          File "/root/openstack/nova/nova/compute/manager.py", line 62, in _update_state
            state = self.driver.get_info(instance_ref.name)['state']
          File "/root/openstack/nova/nova/virt/libvirt_conn.py", line 334, in get_info
            virt_dom = self._conn.lookupByName(instance_name)
          File "/usr/lib/python2.6/dist-packages/libvirt.py", line 1442, in lookupByName
            if ret is None:raise libvirtError('virDomainLookupByName() failed', conn=self)
        libvirt.libvirtError: Domain not found: no domain with matching name 'i-wt4mcqm1'
===============================================

and.. libvirt log is like this.
===============================================
root@gagamels2:/var/log/libvirt/qemu# cat i-wt4mcqm1.log
LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin /usr/bin/kvm -S -M pc-0.12 -enable-kvm -m 512 -smp 1,sockets=1,cores=1,threads=1 -name i-wt4mcqm1 -uuid 61dd3ee4-c5e2-86de-d257-56696eb2463b -nographic -nodefaults -chardev socket,id=monitor,path=/var/lib/libvirt/qemu/i-wt4mcqm1.monitor,server,nowait -mon chardev=monitor,mode=readline -rtc base=utc -boot c -kernel /root/openstack/nova/nova/../instances/i-wt4mcqm1/kernel -initrd /root/openstack/nova/nova/../instances/i-wt4mcqm1/ramdisk -append 'root=/dev/vda1 console=ttyS0' -drive file=/root/openstack/nova/nova/../instances/i-wt4mcqm1/disk,if=none,id=drive-virtio-disk0,boot=on,format=raw -device virtio-blk-pci,bus=pci.0,addr=0x3,drive=drive-virtio-disk0,id=virtio-disk0 -device rtl8139,vlan=0,id=net0,mac=02:16:3e:02:4c:64,bus=pci.0,addr=0x2 -net tap,fd=63,vlan=0,name=hostnet0 -chardev file,id=serial0,path=/root/openstack/nova/nova/../instances/i-wt4mcqm1/console.log -device isa-serial,chardev=serial0 -usb -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x4
chardev: opening backend "file" failed
===============================================

so I tried to run the kvm command directly in command line..
but errors like this.. and kvm didn't run.
===============================================
TUNGETIFF ioctl() failed: Bad file descriptor
TUNSETOFFLOAD ioctl() failed: Bad file descriptor
qemu: could not open disk image console=ttyS0: No such file or directory
===============================================

so I changed -append option
from -append root=/dev/vda1 console=ttyS0
to -append 'root=/dev/vda1 console=ttyS0'
and tried again...
so the messages "qemu: could not open disk image console=ttyS0: No such file or directory" disappeared...
(but TUNGETIFF and TUNSETOFFLOAD related messages was still there..
I guess it is relaged with -net tap blabla option. am I wrong?)
and It seemed that kvm was running..

So, I updated append option from $NOVA_DIR/nova/nova/virt/libvirt.qemu.xml.template
and restart all the nova modules..

but same errors again...

I did search the bugs list about euca-run-instances problems, but my situation wasn't there..

What's wrong with my test and machine ?
QEMU or KVM env?