Changed loading process for database config to check for config for the set environment first.
diff --git a/system/database/DB.php b/system/database/DB.php
index 60a67e8..739e9d0 100644
--- a/system/database/DB.php
+++ b/system/database/DB.php
@@ -27,7 +27,21 @@
 	// Load the DB config file if a DSN string wasn't passed
 	if (is_string($params) AND strpos($params, '://') === FALSE)
 	{
-		include(APPPATH.'config/database'.EXT);
+		
+		$file_path = APPPATH.'config/'.ENVIRONMENT.'/database'.EXT;
+		
+		if ( ! file_exists($file_path))
+		{
+			log_message('debug', 'Database config for '.ENVIRONMENT.' environment is not found. Trying global config.');
+			$file_path = APPPATH.'config/database'.EXT;
+			
+			if ( ! file_exists($file_path))
+			{
+				continue;
+			}
+		}
+		
+		include($file_path);
 
 		if ( ! isset($db) OR count($db) == 0)
 		{