In most cases we suspend customer's accounts because of billing problems.
(your hosting account is expired and you didn't renew it.)
Probably because of administrative or technical questions (unacceptable content of your site, fraud activity, complains, server overload etc.)

If you are unsure about reason of suspension then please contact us:
http://www.epowhost.com/contact.html

If you know about the payment issues, then please pay us and your account will be restored:
https://secure.epowhost.com/cgi-bin/restore.cgi