[v7 -> V8] try to migrate but ...

Hi all,
I try to migrate my Openerp V7

I type the command line :

python /home/desktop/migrate.py --config=/etc/openerp-server.conf --database=CLIKINFO --run-migrations=8.0

and my result is :

python /home/desktop/migrate.py --config=/etc/openerp-server.conf --database=CLIKINFO --run-migrations=8.0
linking server/addons to /var/tmp/openupgrade/8.0/addons
getting git://github.com/OpenUpgrade/OpenUpgrade.git
error: unknown option `single-branch'
usage: git clone [options] [--] <repo> [<dir>]

    -v, --verbose be more verbose
    -q, --quiet be more quiet
    --progress force progress reporting
    -n, --no-checkout don't create a checkout
    --bare create a bare repository
    --mirror create a mirror repository (implies bare)
    -l, --local to clone from a local repository
    --no-hardlinks don't use local hardlinks, always copy
    -s, --shared setup as shared repository
    --recursive initialize submodules in the clone
    --recurse-submodules initialize submodules in the clone
    --template <template-directory>
                          directory from which templates will be used
    --reference <repo> reference repository
    -o, --origin <name> use <name> instead of 'origin' to track upstream
    -b, --branch <branch>
                          checkout <branch> instead of the remote's HEAD
    -u, --upload-pack <path>
                          path to git-upload-pack on the remote
    --depth <depth> create a shallow clone of that depth
    --separate-git-dir <gitdir>
                          separate git dir from working tree
    -c, --config <key=value>
                          set config inside the new repository

copying database CLIKINFO to CLIKINFO_migrated...
Traceback (most recent call last):
  File "/home/desktop/migrate.py", line 300, in <module>
    db_name = copy_database(conn_parms)
  File "/home/desktop/migrate.py", line 26, in copy_database
    conn = psycopg2.connect(**conn_parms)
  File "/usr/lib/python2.7/dist-packages/psycopg2/__init__.py", line 179, in connect
    connection_factory=connection_factory, async=async)
psycopg2.OperationalError: FATAL: Peer authentication failed for user "openerp"

Need help :)

Thank's