We just switched our ISP to ATT and for some reason were are unable to access certain websites. We get page cannot be displayed. I cannot even ping the sites. Yet other pages work fine. If I use our backup ISP (local cable company) I can get to the pages. I have called support from ATT and am getting no where. They keep speaking of our DNS Resolver IP and gave me the IP, but they cannot tell me where to program it. I am thinking it goes in the router they supplied that their T1's come into. But, I am not sure and they are no help. I have had no problems with chaning ISP's in this organization in the past. Anyone help?