[Koha] Howto add an admin account

Hi! Good day! I installed Koha yesterday on a Mandrake 9 box using the installation script provided with koha 1.2.3 (great job, thanks). With some tweaking with our DNS server and virtual hosting config in Apache, I managed to have a running Koha system. My problem is that I cannot create an account that can log-in inside the Koha intranet site. I already tried inserting new record in user table inside MySQL database but still, I cannot login in the intranet site. Thanks and more power to Koha. Regards, Domingo Tamayo