Cannot connect to specific website with new E1505

I purchased an Inspiron E1505 in early December. It runs XP Pro and I purchased the NetGear RangeMax Next Wireless-N Router at the same time. I have the new laptop and an old Inspiron 8100 attached to the wireless network.

 

I used the E1505 for a month and all was well. Then one day it would not access a specific website address that I access on a daily basis. I get the Page Cannot be Displayed message. This happens on both of the laptops. Neither can access the site. (BTW it is a university job site, nothing out of the ordinary) If I go to someone else's house or to my office and access the site it comes up fine. I contacted Dell Support, but all they did was mess with settings, remove IE7, install Mozilla/Firefox, disable all of my security (Trend Micro) and it still doesn't work. I wondered, since both laptops were unable to connect to the site, if it was a router problem. But the Dell rep said no.

 

Anybody out there got any ideas??? Thanks in advance!