There appears to have been an official DMCA claim against you.
Dear Sir/Madam
A user who is using your free hosting for his forum to promote a cracked (warez) version of my software (Wizbot) which has copyrights under the US copyright Office
http://www.copyright.gov/.
I would kindly ask that you have this hosting plan suspended immediately and all copyright material regarding Wizbot removed immediately as it is in direct violation of your ToS (Terms of Service) and US Copyright Laws.
The forum url is:
http://wizinfo.x10hosting.com/forums
Kind Regards
Scott Clarke
Got in touch with one of the admins and that was the official reason for the suspension.
To be blunt, you're more than welcome to attempt a dispute on this, but it's an -official- DMCA complaint that only the actual x10hosting Staff can receive, view, and act upon, and appear to have done so. That's going to make any dispute pretty much one-sided since it was not an automatic suspension - someone had to manually put it on.
Edit 1: I've been the victim of a copyright infringement warning as well, so I should attribute the above quote to who I quoted it from:
(C) 2010 Corey