actually, the server IS up. it's just toooooooooo busy to handle multiple connections. i use JP client, too, and took me about 20 hrs total to go thru the registration process.
if u have guts to get bonded to the chair for hrs, retry, retry, retry, and yet retry until it gets u to the page where u enter ur id/pass. after that, it will give u the famous 0011 error, or other codes, but retry again. do NOT go back after u reached the id/pass page, as most ppl r getting kicked out at that point.
also, after u enter the reg codes, it'll ask "ok to register? yes/no." make sure u hit yes the second u see the choice (the left button). if u don't, and if u get error again and retry, u'll likely get the error page saying "connection was retried. in order to avoid multiple registration, process is terminated. there is a chance that the first attempt went thru so check the member page under service and support to see if it's registered" or somthing like that, but in most cases it didn't go thru and u have to start all over again. hitting yes the second it's displayed seems to help u get thru on the 1st try.