Admin user has lost access to FreePBX sections

When I changed the password of the admin user in FreePBX, I lost access to many sections of FreePBX including the section “Administrator”. I tried to put the AUTHTYPE back to “none” in /etc/amportal.conf and restarted it as well as /etc/init.d/httpd but it did not help. How could I get back the access to every sections of FreePBX?

My server is running Centos 5.2, Asterisk 1.6 and FreePBX