Loading Web Pages Problem Persists after installation of Ubuntu 12.04

[dylan0005]

Hello everyone!

First of all, the main problem is that firefox, chromium and chrome don't load Facebook & yahoomail. If I delete the history and cookies the web pages I previous mentioned load but when I get into the pages(after log in) They don't load anymore so the problem doesn't disappear with that solution.

Note: The other web pages like youtube, gmail, etc... load without any problem. Except google, when I look up something the results are late to show up or just don't showed up.

I don't installed any plugin new. The browsers' plugins are the same that they have by default.
I do not USE Wi-fi connection, just wired. The problem only happen with UBUNTU, in windows no problem!

However, I've tried these quickly solutions:

• Desintall & install again the bowsers
• Get the browsers' configuration back to their original settings
• Try using the Open DNS and Google Public DNS
• Use a Live-CD and try to load the web pages that are causing problems

Nothing has been successfull. So I installed Ubuntu 12.04 LTS instead of my old OS Ubuntu 10.04 LTS, so guess what? The problem still there!
I don't know what else I can do. Please, anyone who wants to help me? What should I do?