Database error with defined prename table header

I got this error when trying to enable shoutbox on my site.

--------------------------------
user warning: Table 'legoguards_drupal.lgds_shoutbox' doesn't exist query: SELECT * FROM lgds_shoutbox WHERE status=1 ORDER BY created DESC LIMIT 0, 10 in /home/legoguards/www/www/includes/database.mysql.inc on line 172.
--------------------------------

I'm assuming it's because the site is set up to have a prefix on the table names (one of the options for the initial configuration of the site) of "lgds_". Specifically, in the settings.php file in /sites/default the following line is set:

$db_prefix = 'lgds_';

Does the install routine need to be adjusted to match this?