I found that you have two bans on your record, the most recent being early January, triggered by a honeypot.
[0] => tekkit.beyondminecraft.net .:. you have been caught destroying a honeypot block. survival.beyondminecraft.net/honeypot.php
[1] => mc1.minersisle.com .:. Griefing
Like you said, however, that date is not recent at all. Adding onto this, you and your friend KeyboardPiano are admins of
this server. Herocraft tends to take caution regarding the whitelisting of admins of other servers, although I'm not sure if I recall the procedure we like to take... @
Angyles , may you be of assistance?