AkismetError at /questions/ask/

edit

I have succesfully installed Askbot on my VPS. I was asking the first question. After entering the details when I clicked on "Ask your question". I got the below error regarding Akismet. I don't know why I'm getting this. In Site Settings I have enabled Akismet with the key.

Note: If I disable Akismet it works fine.

AkismetError at /questions/ask/
missing required argument.
Request Method: POST
Request URL:    http://78.**.**.**:****/questions/ask/
Django Version: 1.4.5
Exception Type: AkismetError
Exception Value:    
missing required argument.
Exception Location: /usr/local/lib/python2.7/dist-packages/akismet-0.2.0-py2.7.egg/akismet.py in comment_check, line 330
Python Executable:  /usr/bin/python
Python Version: 2.7.3

Traceback

Environment:


Request Method: POST
Request URL: http://78.**.**.**:****/questions/ask/

Django Version: 1.4.5
Python Version: 2.7.3
Installed Applications:
('longerusername',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.sites',
 'django.contrib.staticfiles',
 'django.contrib.admin',
 'django.contrib.humanize',
 'django.contrib.sitemaps',
 'django.contrib.messages',
 'compressor',
 'askbot',
 'askbot.deps.django_authopenid',
 'south',
 'askbot.deps.livesettings',
 'keyedcache',
 'robots',
 'django_countries',
 'djcelery',
 'djkombu',
 'followit',
 'tinymce',
 'group_messaging')
Installed Middleware:
('django.contrib.sessions.middleware.SessionMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'askbot.middleware.anon_user.ConnectToSessionMessagesMiddleware',
 'askbot.middleware.forum_mode.ForumModeMiddleware',
 'askbot.middleware.cancel.CancelActionMiddleware',
 'django.middleware.transaction.TransactionMiddleware',
 'askbot.middleware.view_log.ViewLogMiddleware',
 'askbot.middleware.spaceless.SpacelessMiddleware')


Traceback:
File "/usr/lib/python2.7/dist-packages/django/core/handlers/base.py" in get_response
  111.                         response = callback(request, *callback_args, **callback_kwargs)
File "/usr/lib/python2.7/dist-packages/django/utils/decorators.py" in _wrapped_view
  91.                     response = view_func(request, *args, **kwargs)
File "/sfc/sfc/askbot/utils/decorators.py" in wrapper
  136.             return view_func(request, *args, **kwargs)
File "/sfc/sfc/askbot/utils/decorators.py" in wrapper
  212.                 if api.comment_check(comment, data, build_data=False):
File "/usr/local/lib/python2.7/dist-packages/akismet-0.2.0-py2.7.egg/akismet.py" in comment_check
  330.             raise AkismetError('missing required argument.')

Exception Type: AkismetError at /questions/ask/
Exception Value: missing required argument.

AND /usr/local/lib/python2.7/dist-packages/akismet-0.2.0-py2.7.egg/akismet.py in comment_check raise AkismetError('missing required argument.')

comment 
'This is a test question posted by anonymous.'
build_data  
False
url 
u'http://f6cdabd27a9a.rest.akismet.com/1.1/comment-check'
resp    
'blog value must be a fully qualified url. example: <code>http://example.com/</code>'
headers 
{'User-Agent': 'Askbot/0.7.48 | akismet.py/0.2.0'}
DEBUG   
False
data    
{'blog': ':///questions/',
 'comment_author': 'chankey',
 'comment_author_email': u'chankey007@gmail.com',
 'user_agent': 'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.116 Safari/537.36 AlexaToolbar/alxg-3.1',
 'user_ip': '115.252.211.182'}
self    
<akismet.Akismet object at 0x99825ec>

Error in askbot.log

/usr/lib/python2.7/dist-packages/django/core/handlers/base.py TIME: 2013-06-28 05:53:35,094 MSG: base.py:handle_uncaught_exception:215 Internal Server Error: /questions/ask/
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/django/core/handlers/base.py", line 111, in get_response
    response ...