4
Hi,
What he means is, you need to use a tool, like
phpMyAdmin to edit the MySQL database that stores the data driving your XOOPS website. Although the GUI has been hosed by your selection of LDAP Authentication, you can remedy that situation by finding that field in the MySQL database that was changed from 'xoops' to 'ldap' and switching it back manually.
And just in case you don't know, phpMyAdmin is a php-based GUI that acts as a database editor of sorts for your MySQL database. So download it, install it into your htdocs directory, configure it for root access and make the change by running it in your browser. Then remove it! You don't want just anyone coming by your site to be able to phpMyAdmin into it with root access.