Did you all read that post http://x10hosting.com/forums/news-announcements/113124-some-quick-answers-few-questions.html ????
This might be reason of this problem..
Go to http://x10hosting.com/panel.php Login with Forums username and password.
Click on View Suspension Report on Right Sidebar. Unsuspend you account there..
If you already done this then wait for some time..