kevin, as far as i am aware, /admin was only released in 5.5-5.9. it should be admin_index.php. I do not think the htaccess is redirecting it to admin
edit: you were right, i checked htaccess
Code:
RewriteRule ^admin/?$ admin_index.php
edit 2: try this, (lol) in the .htaccess file change the line i posted above to:
Code:
RewriteRule ^pliggadmin/?$ admin_index.php
then go to ww.yoursite.com/pliggadmin
technically, that should work.