Windows 7 - Can't visit a certain site

I can't visit this site: maplestory.nexon.net(pretty nice game btw)
However I am able to visit the site when i use a proxy. I know I'm not banned because I'm still on the rankings. Might be a possible outcome of what happened to me earlier. Problems in my computer - Windows 7 Forums
Thanks in advance!
EDIT: lol i just found out there was an edit button ahahahah. So I also found out I cant visit the Firefox site. Why is this happening to me

Oh, and I'm Using Firefox 4.0

And before I reinstalled Windows 7, and before I got the black screen of death, I could visit that site without complications. I also tried the netsh winsock reset but I still cant visit the site.

Try upgrading firefox to the latest version, i.e firefox 10.

Try clearing your DNS cache

Open an advanced command prompt

Start> In search box type cmd> Right click on cmd.exe in results above and choose Run as administrator

Type in the following, followed by enter for each

ipconfig /flushdns

Enter

ipconfig /release

Enter

ipconfig /renew

Enter

See if that helps.

And yes, do update your FF, that version is insecure.

A Guy

Thanks Arc, but it still doesn't solve my problem. Thanks though

It worked!!! I did the cmd stuff and it worked! Thanks A Guy!

Great, glad we can help And welcome to Seven Forums whee12.

A Guy

The problem came back.

Hmmm, do you have a cookie set for logging in? Try clearing the cookie for that site, andclearing your cache, then try it again. If clearing dns did the trick, then your ISP shouldn't be blocking it, which was indicated by the proxy working there. You might try booting to safe mode with networking to see if that works ok. If so, a clean start to see if something is interfering with it might help.

Troubleshoot Application Conflicts by Performing a Clean Startup

A Guy