[pdf-devel] bzr error

[Jagadees S]

hi,
I am getting following error
bzr: ERROR: Unknown branch format: 'Bazaar Branch Format 6 (bzr 0.15)\n'

i ran command: bzr branch http://bzr.sv.gnu.org/r/pdf/libgnupdf/branches/trunk

i have debian 4.0 and
Bazaar (bzr) 0.11.0
Using python interpreter: /usr/bin/python
Using python standard library: /usr/lib/python2.4
Using bzrlib: /usr/lib/python2.4/site-packages/bzrlib

pls help,
jagadees.