I own a broadband nouns from BSNL India. It be working fine till I added another notebook through a D-Link switch. Now I can access different sites, but am not competent to access hotmail, yahoo mail etc...
Answers:
Well when you see the issue resembling this, the one and only path to fix it is to contact near your internet service provider. They'll do rather checking for your conenction and fix it.
Good Luck,