On the front page you link to the menu of the 2channel English Navigator, not its front page.
Also, you let it open in the frame "side".
The links in the 2channel English Navigator then open in the frame "cont" which is not defined in the menu frame of the 2channel English Navigator but only in its main site.
Thus the links open in new windows automatically. I think that's not what anyone really wants.
I think it would be a better solution to link to http://4-ch.net/2chportal/ from http://4-ch.net/4ch.html either by new window or direct link.
Also, it's "Japanese", not "Japaness".