Vista - Explorer Cannot Display

While trying to open web pages within the Golfsmith site I keep getting a message telling me that Explorer cannot display the web page. The three things that it says may be wrong are all okay (not connected, site encountering problems, typing error). The diagnosis says there is no internet problems Perhaps it is in the security settings of Vista but I have tried to change them and maybe I have missed something. Do you have any suggestions to try that may help me to display the clubs available for trade-in setting web page? Thanks, Charlie