Bsnl broadband page can not be displayed

Hello,

I am having the problem with bsnl broadband.
It was working fine.
But last 5-6 days, I am not able to connect any website.
I am getting the message "page can not be displayed".
But I am able to ping 192.168.1.1 and I can open that site "192.168.1.1" also.
If I see the Logistics in that site, the number of packets sent and recieved are OK, that is the numbers are increasing when I refresh.
But if I see -> Control panel -> Network connection -> Local area connection status, the number of Packets transferred is not increasing. It is showing very very less value like 10,20.
I am using 192.168.1.34 as my IP address.
The subnet mask is 255.255.255.0 and gateway is 192.168.1.1.
Preferred DNS address is also 192.168.1.1 and Alternative address is null.
I am using windows XP.
I did not change any settings.
Suddenly it is not working for the past 6 days.
help me please.