For some reason I can't log in to gmail one specific computer

For some reason I can't log in to gmail on one specific computer. I can log in to igoogle but can't get to my mail. My mail works fine on my other computer. When I try to go to gmail.com Internet Explorer automatically does a web search. when i click on gmail in the results it allows me to input my username and password and then i get an error screen that says Internet Explorer cannot diplay the web page. Every other site is fine (I tried Facebook, ESPN, CNN, etc) and google.com and igoogle.com are all fine. Please help!