I'm not sure what you mean by 'parked', but if you mean you cannot access the website but can access others, I suspect the problem is the website, not your PC browser or any other PC problem unless the site is blocking you with a cookie.

Try removing all cookies. I use CCleaner. Just click on 'run cleaner' which will leave you with a nice clean slate. Any forums you belong too will require you to log in after cleaning out all cookies.