bzr hang

guys when i try to download any program from anywhere , bzr just work then freeze for minutes stating
 Fetching revisions:Inserting stream

for example : bzr branch lp:etracer
You have not informed bzr of your Launchpad ID, and you must do this to
write to Launchpad or access private data. See "bzr help launchpad-login".
[#########- ] 1937KB 25KB/s | Fetching revisions:Inserting stream

it freeze , it just download the .bzr folder but nothing else , this is the log

Sat 2009-10-03 12:49:30 +0300
0.036 bzr arguments: [u'branch', u'lp:etracer']
0.051 looking for plugins in /home/deepinlife/.bazaar/plugins
0.051 looking for plugins in /usr/lib/python2.5/site-packages/bzrlib/plugins
0.107 encoding stdout as sys.stdout encoding 'UTF-8'
[16586] 2009-10-03 12:49:32.618 WARNING: You have not informed bzr of your Launchpad ID, and you must do this to
write to Launchpad or access private data. See "bzr help launchpad-login".
11.938 creating repository in file:///home/deepinlife/Desktop/programming/GNUpdf/src/etracer/.bzr/.
11.959 Using fetch logic to copy between KnitPackRepository('http://bazaar.launchpad.net/~vcs-imports/etracer/tru
nk/.bzr/repository/')(<RepositoryFormatKnitPack1>) and KnitPackRepository('file:///home/deepinlife/Desktop/program
ming/GNUpdf/src/etracer/.bzr/repository/')(<RepositoryFormatKnitPack1>)
65.958 25 bytes left on the HTTP socket
110.588 25 bytes left on the HTTP socket
135.977 Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 842, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 1037, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 654, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.5/site-packages/bzrlib/builtins.py", line 1243, in run
    source_branch=br_from)
  File "/usr/lib/python2.5/site-packages/bzrlib/bzrdir.py", line 1185, in sprout
    result_repo.fetch(source_repository, fetch_spec=fetch_spec)
  File "/usr/lib/python2.5/site-packages/bzrlib/repository.py", line 1695, in fetch
    find_ghosts=find_ghosts, fetch_spec=fetch_spec)
  File "/usr/lib/python2.5/site-packages/bzrlib/decorators.py", line 192, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/lib/python2.5/site-packages/bzrlib/repository.py", line 3413, in fetch
    pb=pb, find_ghosts=find_ghosts)
  File "/usr/lib/python2.5/site-packages/bzrlib/fetch.py", line 81, in __init__
    self.__fetch()
  File "/usr/lib/python2.5/site-packages/bzrlib/fetch.py", line 107, in __fetch
    self._fetch_everything_for_search(search)
  File "/usr/lib/python2.5/site-packages/bzrlib/fetch.py", line 135, in _fetch_everything_for_search
    stream, from_format, [])
  File "/usr/lib/python2.5/site-packages/bzrlib/repository.py", line 4238, in insert_stream
    return self._locked_insert_stream(stream, src_format, is_resume)
  File "/usr/lib/python2.5/site-packages/bzrlib/repository.py", line 4271, in _locked_insert_stream
    self.target_repo.texts.insert_record_stream(substream)
  File "/usr/lib/python2.5/site-packages/bzrlib/knit.py", line 1598, in insert_record_stream
    for record in stream:
  File "/usr/lib/python2.5/site-packages/bzrlib/knit.py", line 1405, in get_record_stream
    ordering, include_delta_closure):
  File "/usr/lib/python2.5/site-packages/bzrlib/knit.py", line 1521, in _get_remaining_record_stream
    for key, raw_data in self._read_records_iter_unchecked(records):
  File "/usr/lib/python2.5/site-packages/bzrlib/knit.py", line 1975, in _read_records_iter_unchecked
    data = raw_records.next()
  File "/usr/lib/python2.5/site-packages/bzrlib/knit.py", line 3363, in get_raw_records
    for names, read_func in reader.iter_records():
  File "/usr/lib/python2.5/site-packages/bzrlib/pack.py", line 290, in _iter_records
    for record in self._iter_record_objects():
  File "/usr/lib/python2.5/site-packages/bzrlib/pack.py", line 295, in _iter_record_objects
    record_kind = self.reader_func(1)
  File "/usr/lib/python2.5/site-packages/bzrlib/pack.py", line 236, in reader_func
    return self._source.read(length)
  File "/usr/lib/python2.5/site-packages/bzrlib/pack.py", line 192, in read
    self._next()
  File "/usr/lib/python2.5/site-packages/bzrlib/pack.py", line 187, in _next
    offset, data = self.readv_result.next()
  File "/usr/lib/python2.5/site-packages/bzrlib/transport/http/__init__.py", line 250, in _readv
    data = rfile.read(size)
  File "/usr/lib/python2.5/site-packages/bzrlib/transport/http/response.py", line 231, in read
    osutils.pumpfile(self._file, buffer, limited, self._max_read_size)
  File "/usr/lib/python2.5/site-packages/bzrlib/osutils.py", line 555, in pumpfile
    block = from_file.read(num_bytes_to_read)
  File "/usr/lib/python2.5/socket.py", line 328, in read
    data = self._sock.recv(left)
  File "/usr/lib/python2.5/httplib.py", line 529, in read
    s = self.fp.read(amt)
  File "/usr/lib/python2.5/site-packages/bzrlib/transport/http/_urllib2_wrappers.py", line 85, in read
    s = self.filesock.read(size)
  File "/usr/lib/python2.5/socket.py", line 328, in read
    data = self._sock.recv(left)
KeyboardInterrupt

135.978 return code 3

i tried more sites but ll fail with the same way , search speak bout proxies and network errors but i donno .
i have linux ubuntu 9.04 , kernel 2.6.27-14-generic

any idea?