Port 9999 is open on mybitcoin's server 83.149.112.133
So its not down, or hung, nor is it a httpd crash (that would give a closed port), someone purposely put up a firewall to block all the other ports.

If anyone who has lost a money in it the only hope you have of getting it back is to quickly get a court order in Netherlands for the hosting provider leaseweb to freeze the contents of his server and hopefully the BTC can be recovered.