They are not working at the moment, as has been mentioned before in this thread
By the way, as a general point - the Ning search function is useless. To avoid posting duplicate topics, it is worth searching this forum first using google to see if your issue has already been addressed.
Just type your search terms followed by site:grasshopper3d.com to limit the results to just those from this site.
For example
"remote control panel site:grasshopper3d.com"