can not launch first VM | u'OSError'

Hi,

Installed Openstack Folsom on my laptop with Ubuntu 12.10.
I can'nt launch from dashboard (or even with Cli). Any ideas ?

Here is the nova show output :
===========================================================
root@b-dc-aga:~# nova show v1
ERROR:dbus.proxies:Introspect error on :1.1:/org/freedesktop/secrets/aliases/default: dbus.exceptions.DBusException: org.freedeskret.Error.NoSuchObject: The '/org/freedesktop/secrets/aliases/default' object does not exist
ERROR:dbus.connection:Unable to set arguments ({'org.freedesktop.Secret.Item.Label': 'http://localhost:5000/v2.0/serviceadmu//pubcompute// @ novaclient_auth', 'org.freedesktop.Secret.Item.Attributes': {'username': 'http://localhost:5000/v2.0/serviceadmu//pubcompute//', 'service': 'novaclient_auth'}}, dbus.Struct((dbus.ObjectPath('/org/freedesktop/secrets/session/s10'), '', dbus.ByteAr3d8aac5e94497bb155e20b100e8a3e|http://localhost:8774/v2/1231235be0fe409d8faee4bf26d37520'), 'text/plain'), signature=None), True)ing to signature None: <type 'exceptions.TypeError'>: Expected a string or unicode object
+-------------------------------------+-----------------------------------------------------------------------------+
| Property | Value |
+-------------------------------------+-----------------------------------------------------------------------------+
| OS-DCF:diskConfig | MANUAL |
| OS-EXT-SRV-ATTR:host | beyte-dc-aga |
| OS-EXT-SRV-ATTR:hypervisor_hostname | beyte-dc-aga |
| OS-EXT-SRV-ATTR:instance_name | instance-0000000b |
| OS-EXT-STS:power_state | 0 |
| OS-EXT-STS:task_state | None |
| OS-EXT-STS:vm_state | error |
| accessIPv4 | |
| accessIPv6 | |
| config_drive | |
| created | 2013-01-18T23:04:47Z |
| fault | {u'message': u'OSError', u'code': 500, u'created': u'2013-01-18T23:04:50Z'} |
| flavor | m1.tiny (1) |
| hostId | eb67806c68116c81d366c2d1488964ffe5a9853d306748b21bdaf002 |
| id | 3ba6dfc3-78d9-4bf7-a090-2f27e9c98f43 |
| image | Ubuntu1 (f1ec4534-abf9-4633-be5f-c1e0e939f5f2) |
| key_name | None |
| metadata | {} |
| name | v1 |
| net2_test network | 10.3.0.3 |
| security_groups | [{u'name': u'default'}] |
| service_test_net1 network | 10.2.0.3 |
| status | ERROR |
| tenant_id | 1231235be0fe409d8faee4bf26d37520 |
| updated | 2013-01-18T23:04:50Z |
| user_id | e516c6d5363b48f4884ee84e087d6667 |
+-------------------------------------+-----------------------------------------------------------------------------+
===============
Thank's.