Can't update to Ubuntu 12.04 on 11.10

I'm having problems on updating Ubuntu 11.10 to 12.04, I've tried to update all possible ways.

I'v downloaded Ubuntu 12.04 from cd...but when booting the upgrade option wont appear...just: Install alongside-Erase disk and Install-Other.

So after waiting 5 days I thought that be enough to update the mirror for my contry, Spain. Even though is not showing any upgrade to 12.04 just normal updates...I've tried changing the mirrors and changed to main server and luck either...after googling a bit..I've found this mirror which does host an upgrade to 12.04 and switched to that mirror with no luck on upgrade either. ftp.halifax.rwth-aachen.de

Read here and there and tried Sudo apt-get update Sudo apt-get dist-upgrade and do-release-upgrade

No luck with all of them....in doing do release upgrade I get:

Checking for a new ubuntu release
Unhandled exception in thread started by <bound method MetaReleaseCore.download of <UpdateManager.Core.MetaRelease.MetaReleaseCore object at 0x7f03a9f09fd0>>
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/UpdateManager/Core/MetaRelease.py", line 261, in download
uri=urllib2.urlopen(req, timeout=20)
File "/usr/lib/python2.7/urllib2.py", line 126, in urlopen
return _opener.open(url, data, timeout)
File "/usr/lib/python2.7/urllib2.py", line 394, in open
response = self._open(req, data)
File "/usr/lib/python2.7/urllib2.py", line 412, in _open
'_open', req)
File "/usr/lib/python2.7/urllib2.py", line 372, in _call_chain
result = func(*args)
File "/usr/lib/python2.7/urllib2.py", line 1201, in http_open
return self.do_open(httplib.HTTPConnection, req)
File "/usr/lib/python2.7/urllib2.py", line 1174, in do_open
r = h.getresponse(buffering=True)
File "/usr/lib/python2.7/httplib.py", line 1027, in getresponse
response.begin()
File "/usr/lib/python2.7/httplib.py", line 407, in begin
version, status, reason = self._read_status()
File "/usr/lib/python2.7/httplib.py", line 365, in _read_status
line = self.fp.readline()
File "/usr/lib/python2.7/socket.py", line 447, in readline
data = self._sock.recv(self._rbufsize)
socket.timeout: timed out
^CTraceback (most recent call last):
File "/usr/bin/do-release-upgrade", line 83, in <module>
time.sleep(0.5)
KeyboardInterrupt

After doing what jhon suggested I got no network working with ethernet or wireless either.

Any ideas??I think netroot is what crashed the networking..?

Try on a terminal:

sudo update-manager -d