There is a serious problem in Forum menu

There is a serious problem in Forum menu

I've using Zoho Projects these days, and I found a serious problem.
I recently wrote a post in Forums.
But, maybe because of improper HTML tags, the post blocked all the right menus (invisible) and even the content of the post is invisible.

the post title is "Google Maps API Document"
and the category is "개발" (sorry that it's korean)

please reply me through rhox@rhox.kr if there is a solution for this.
We cannot step forward because we cannot access to another
sub-menus.

the url is http://cuey.projects.zoho.com
Thank you.
노용석