DNS Server not responding

AoA...

I recently got zte zxdsl modem....and the service. I did everything mentioned in the guide (published on ptcl website). But the internet's not working. I have Windows 7 installed. When I ran the diagnostics, it said the DNS server is not responding. As usual, I googled this and reached this forum...read many posts regarding which DNS servers I should use......tried everything including the google dns server, but still not working.

Please help me solve this problem......

try ths

Primary 203.99.163.240

SEc. 202.125.132.12

ok.......still not working.....now iam getting this error: "Your broadband is experiencing connectivity issues"........

@uzair try using these :

Primary : 221.120.226.45

Secondary : 116.71.241.216