出了什么问题，致命错误：base_url不正确

Question

config.php is defined as following:

$base_config['base_url'] = 'http://localhost/sg-cms/';

    $base_config['db_host'] = 'localhost';
    $base_config['db_name'] = 'sg-cms';
    $base_config['db_user'] = 'root';
    $base_config['db_pass'] = '';

    $base_config['theme']   = 'basic';

    $base_config['allow_5_4'] = false;

    $base_config['salt']            = 'dfsfdsfdsfasfafasfsfadfvdfdfsfa';
    $base_config['encryption_key']  = 'bjAdffdsfdfadfaJv';

when going to loclhost I see the follwoing error:

Fatal error: Incorrect base_url: 'http://localhost/sg-cms/' does not match 'http://localhost/SWEBSITES/t_m/website/index.php' in C:\wamp\www\SWEBSITES\t_m\website\includesouting.php on line 277

what is going wrong here exactly because it seems like when I fix something another thing gets corrupted!