No two year extension for new scheme students (students enrolled in and after 2005). You should go for re-registration. All passed subjects will be cancelled. There is no other way.
You have to send (i) reregistration form with requisite fee (ii) registration for section B form with requisite fee (if passed section A) (iii) change of address form (if your recorded address has been changed) with requisite fee.
For re-registration, click http://www.amiestudycircle.com/membership.htm