You can determine what server you are on by doing a view page source on the screen that has the "Open cPanel" button that you press (button starts out gray and them becomes enabled) when signing in normally. Look for:
<form action="https://x11.x10hosting.com:2222/CMD_LOGIN" method="post"...
I cannot login to my account either. Sometimes the signin page returns "An error has occurred processing your request." and sometimes just a blank page is returned. At one point I got to the following screen but the button changed from "Standby" to "Error".