No route to host

This is the error message I receive when I try to connect to my site. What does it mean and what could be the causes? I used to connect to my account before the servers crashed. I asked to be recreated ssh acount. I asked about password and it''s ok. Don't know the causes.

TIA
Mike

Please try to connect to your host using Putty, both with 0.53b (latest stable release) and latest development snapshort. Let me know what was results like.