You are on the Lotus server, which is down at the moment for all its users. It seems to have been plagued with problems for the past week, but knowing X10, it should be back up sometime soon.
Excessive server use and/or abuse. There are thousands of hosting accounts on each server so the use and/or abuse affects the server. There is also this in the server status page http://status.x10hosting.com/. They say that it's going to take at least a week to run the script to terminate/delete around 50,000 inactive hosting accounts. It's going to affect the servers stability until it's done.