Blackbook::BadCredentialsError: Must be authenticated to access contacts.

Hi,

i get

Blackbook::BadCredentialsError: Must be authenticated to access
contacts.
from /home/hemanth/5latest/2_0_branch/vendor/plugins/cheald-blackbook/
lib/blackbook/importer/gmail.rb:58:in `scrape_contacts'
  from /home/hemanth/5latest/2_0_branch/vendor/plugins/cheald-blackbook/
lib/blackbook/importer/page_scraper.rb:30:in `fetch_contacts!'
  from /home/hemanth/5latest/2_0_branch/vendor/plugins/cheald-blackbook/
lib/blackbook/importer/base.rb:29:in `import'
  from /home/hemanth/5latest/2_0_branch/vendor/plugins/cheald-blackbook/
lib/blackbook.rb:32:in `export'
  from /home/hemanth/5latest/2_0_branch/vendor/plugins/cheald-blackbook/
lib/blackbook.rb:56:in `get'
  from /home/hemanth/5latest/2_0_branch/vendor/plugins/cheald-blackbook/
lib/blackbook.rb:16:in `get'

from the console.