most of you know there is a slight issue with the cookies and login in. the reason is that the forums and the webpage are on different domains. your browser is accepting any cookie from the website but blocks the forum cookies.
solutions
1) go to tools->internet options
2) click on the 'privacy' tab
3) go down to the bottom where it says edit and click on it
OR
3) click on the "site..." button on the left
4) under "address of website" type in
http://s15.invisionfree.com/ShinhwaChangjo and click 'allow'
now under 'managed web site'
http://s15.invisionfree.com/ShinhwaChangjo should be added in with the setting 'always allow'
you can now turn your privacy settings down to 'medium' 'high' 'low' or whatever you want
you can also use this method for other sites that you are having cookie problems with