seems like, "Your account is not yet suspended, is experiencing a problem which we all are experiencing atm, and is posted in this topic => http://www.helionet.org/index/index.php?showtopic=6042
as far as about the notice, it seems that you did'nt had login-ed in your cPanel, in a couple of days, thus the admins or automated warning system, sent you a caution notice. [nothing more than that].
"I'm not a heliohost staff member. The above lines solely represent my view."