Sounds like you just need to respond to the confirmation email sent to your new email address.
Basically, the system requires that you always have a valid email address. So if you change your email address, it sends a new confirmation to the new address. You have to click the link in that email in order to re-activate your account and restore your posting privileges.
Maybe your new email address caught the brs email in its junk mail?
Well, that's my guess as to what is going on... I don't speak for the admins though so you may get a follow up from someone else.