Multi-DB: No WPMU site defined on this host

I've read many threads on this, but I have yet to find a solution that fixes my issue. Below is what is configured in db-config.php

define ('DB_SCALING', '16');
//------------------------------------------------------------------------//
//---DC IPs---------------------------------------------------------------//
//------------------------------------------------------------------------//
// Usage: add_dc_ip(IP, DC)
// EX: add_dc_ip('123.123.123.', 'dc1');
add_dc_ip('174.142.32.', 'dc1');
//------------------------------------------------------------------------//
//---Global Tables--------------------------------------------------------//
//------------------------------------------------------------------------//
// Do not include default global tables
// Leave off base prefix (eg: wp_)
//
// Usage: add_global_table(TABLE_NAME)
// EX: add_global_table('something');

add_global_table('blogs');
add_global_table('blog_versions');
add_global_table('registration_log');
add_global_table('signups');
add_global_table('site');
add_global_table('sitecategories');
add_global_table('sitemeta');
add_global_table('support_faq');
add_global_table('support_faq_cats');
add_global_table('support_tickets');
add_global_table('support_tickets_cats');
add_global_table('support_tickets_messages');
add_global_table('usermeta');
add_global_table('users');

//------------------------------------------------------------------------//
//---DB Servers-----------------------------------------------------------//
//------------------------------------------------------------------------//
// Database servers grouped by dataset.
// R can be 0 (no reads) or a positive integer indicating the order
// in which to attempt communication (all locals, then all remotes)
//
// Usage: add_db_server(DS, DC, READ, WRITE, HOST, LAN_HOST, NAME, USER, PASS)
// EX: add_db_server('global', 'dc1', 1, 1,'global.mysql.example.com:3509','global.mysql.example.lan:3509', 'global-db', 'globaluser', 'globalpassword');

add_db_server('global', 'dc1', 1, 1,'localhost','174.142.32.182', 'joshmac_global', 'XXXX', 'XXXX');

The last line above has the dedicated ip address of my website. I've tried different variations of server ip with localhost, vice versa, etc. But nothing seems to work. Please let me know what I am doing wrong. Thanks.