sqlmap version: 1.1.3.4#dev
Python version: 2.7.10
Operating system: nt
Command line: sqlmap.py -u *********************************************************
Technique: None
Back-end DBMS: None

Traceback (most recent call last):
  File "sqlmap.py", line 151, in main
    start()
  File "lib/controller/controller.py", line 377, in start
    if not checkConnection(suppressOutput=conf.forms) or not checkString() or not checkRegexp():
  File "lib/controller/checks.py", line 1461, in checkConnection
    page, headers = Request.queryPage(content=True, noteResponseTime=False)
  File "lib/request/connect.py", line 1159, in queryPage
    page, headers, code = Connect.getPage(url=uri, get=get, post=post, method=method, cookie=cookie, ua=ua, referer=referer, host=host, silent=silent, auxHeaders=auxHeaders, response=response, raise404=raise404, ignoreTimeout=timeBasedCompare)
  File "lib/request/connect.py", line 485, in getPage
    responseHeaders = conn.info()
AttributeError: 'NoneType' object has no attribute 'info'