I can not login facebook with robobrows?

Could some one help me? Thank you!
from robobrowser import RoboBrowser

browser = RoboBrowser(user_agent='Mozilla/5.0 (Windows; U; Windows NT 1;\en- US; rv:1.8.1.6) Gecko/20070725 Firefox/2.0.0.6')
browser.open('https://www.facebook.com/')
# Get the signup form

form = browser.get_form(id='login_form')
form['email'].value = 'my_user'
form['pass'].value = 'my_pass'
browser.submit_form(form)
Erro:
requests.exceptions.ConnectionError: ('Connection aborted.', ResponseNotReady('Request-sent',))