I think its a problem of resolv.conf file
Just make entries of ur DNS servers in /etc/resolv.conf file
..If u dont know ur DNS servers addresses , then no pbs ... U just go to Windows and connect through Windows .., just check the DNS entries there .., as Windows automatically takes DNS entries ...so just see that entries and make that DNS Servers entries in /etc/resolv.conf file...
I think , after that it will work...
Gaurav