poserclub.jp is working fine for me.

I suspect that you need to login again.
There is a thread somewhere here with screenshots to help you navigate, but I can't seem to find it at the moment.
This one (-> http://www.renderosity.com/mod/forumpro/showthread.php?message_id=2206984&ebot_calc_page#message_2206984) should help if you need to register.