package repository not online

I have installed MiKTeX 2.9 (64bit) on a windows 7 machine.
When I try to update the packages the list of servers does not appear and I
receive the error message included at the end of this post.
The predefined server, or the nearest server is not online, at least from
the point of view of MikTeX, but it does not allow change it.
It happens with both Package Manager and Package Manager (admin).
I even put the Package Manager (admin) in the whitelist of programs allowed
to bypass the firewall, with no avail. The problem persists.
¿Does anybody know a solution to this problem?
The error information is the following:

MiKTeX Problem Report
Message: The remote package repository is not online. You have to choose
another repository.
Data:
http://ftp.fernuni-hagen.de/ftp-dir/pub/mirrors/www.ctan.org/systems/win32/miktex/tm/packages/
Source: Libraries\MiKTeX\PackageManager\PackageManager.cpp
Line: 2475
MiKTeX: 2.9
OS: Microsoft Windows 7 Home Premium Edition, 64-bit Service Pack 1 (build
7601)
Invokers: explorer
SystemAdmin: yes
PowerUser: no
Root0: C:\Users\javi\AppData\Roaming\MiKTeX\2.9
Root1: C:\Users\javi\AppData\Local\MiKTeX\2.9
Root2: C:\ProgramData\MiKTeX\2.9
Root3: C:\Program Files\MiKTeX 2.9
UserInstall: C:\Users\javi\AppData\Roaming\MiKTeX\2.9
UserConfig: C:\Users\javi\AppData\Roaming\MiKTeX\2.9
UserData: C:\Users\javi\AppData\Local\MiKTeX\2.9
CommonInstall: C:\Program Files\MiKTeX 2.9
CommonConfig: C:\ProgramData\MiKTeX\2.9
CommonData: C:\ProgramData\MiKTeX\2.9

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