So I converted using the converters for SMF what and got an error from one admin account I merged it with my current account and what happened was I cannot login anymore. Help needed thank you.

When I try to register it says Im not authorized to do that

Edit the database and give your admin account a new password (md5 hash generated)

Or create a new user and edit the database and change that users group to an admin then log into ACP and edit the original Admin