I was installing Convirture following the steps on http://www.convirture.com/wiki/index...u_installation when i got stuck in the following step:

sudo ./convirt-install/install/cms/scripts/install_dependencies
[sudo] password for pre:
install common functions sourced.
VER 10.10
CODENAME maverick
KERNEL 2.6.35-28-generic
ARCH x86_64
Info: Sourcing /home/pre/convirt-install/install/cms/scripts/../../../common/scripts/Ubuntu_functions
Info: Sourcing /home/pre/convirt-install/install/cms/scripts/../common/Ubuntu_functions
Reading package lists... Done
Building dependency tree
Reading state information... Done
build-essential is already the newest version.
libxen3 is already the newest version.
python-paramiko is already the newest version.
wget is already the newest version.
dnsmasq is already the newest version.
python-xen-3.3 is already the newest version.
socat is already the newest version.
uml-utilities is already the newest version.
mysql-server is already the newest version.
python-dev is already the newest version.
ssh is already the newest version.
The following packages were automatically installed and are no longer required:
linux-headers-2.6.35-22-generic linux-headers-2.6.35-22
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
--2011-04-14 00:03:34-- http://peak.telecommunity.com/dist/ez_setup.py
Resolving netmon.iitb.ac.in...
Connecting to netmon.iitb.ac.in||:80... connected.
Proxy request sent, awaiting response... 200 OK
Length: 10240 (10K) [text/plain]
Saving to: `ez_setup.py.10'

100%[================================================== ================================================== ==========================>] 10,240 19.7K/s in 0.5s

2011-04-14 00:03:42 (19.7 KB/s) - `ez_setup.py.10' saved [10240/10240]

Downloading http://pypi.python.org/packages/2.6/...6c11-py2.6.egg
Traceback (most recent call last):
File "ez_setup.py", line 278, in <module>
File "ez_setup.py", line 210, in main
egg = download_setuptools(version, delay=0)
File "ez_setup.py", line 158, in download_setuptools
src = urllib2.urlopen(url)
File "/usr/lib/python2.6/urllib2.py", line 126, in urlopen
return _opener.open(url, data, timeout)
File "/usr/lib/python2.6/urllib2.py", line 391, in open
response = self._open(req, data)
File "/usr/lib/python2.6/urllib2.py", line 409, in _open
'_open', req)
File "/usr/lib/python2.6/urllib2.py", line 369, in _call_chain
result = func(*args)
File "/usr/lib/python2.6/urllib2.py", line 1170, in http_open
return self.do_open(httplib.HTTPConnection, req)
File "/usr/lib/python2.6/urllib2.py", line 1145, in do_open
raise URLError(err)
urllib2.URLError: <urlopen error [Errno 101] Network is unreachable>
ERROR: Failed installing ez_setup/distutils.

I've checked out all possible solutions to proxy settings(export http_proxy to changing my apt.conf file) but nothing seems to work.

Could someone please help me out? thanks!