page cannot be displayed

I am operating windows xp with a linksys wireless router to a 2nd xp.  All was well until a site that i frequently visit went down last evening.  Since then every time i try to go to that site i get a "page cannot be displayed" message...this on both computers.  All other sites i go to are fine...and all other people i know are having no trouble accessing that site today.  I have talked to my dsl providor and they block no sites.  I have talked to linksys and we tried a number of things, including changing security settings and disabling firewalls... that did no good.  Can you tell me why i cannot access this site that is now back up and running fine.  Seems like i am stuck on last nights message.

Additional info for above problem.....
I have just downloaded Netscape browser and tried to get to the miscreant site via netscape.  I got a "timed out" message
on this browser.  All other sites i tried load perfectly.. so the problem is not in ie after all. but somewhere in my operating system or my linksys.  all help would be greatly appreciated.
BTW  the site i am trying to recover is www.pinnaclesports.com if you try it you will see YOU will have no problems accessing it.  ....only me   :-/   please help!

Try the following:

1. Start
2. Settings
3. Control Panel
4. Internet Options
5. Security tab
6. Reset all security zones to Default

And/or

1. Start
2. Settings
3. Control Panel
4. Internet Options
5. Advanced
6. Restore Defaults button.

Also do the following:

1. Start
2. Settings
3. Control Panel
4. Internet Options
5. Remove cookies, temporary files and history

You may also need to scan for Spyware

Anti spy/malware
Microsoft Antispyware
-- Anti spyware scanner. Windows XP Home and Professional only.
Spybot Search & Destroy
-- Anti spyware scanner
Adaware SE Personal
-- Anti spyware scanner