Connect to MySQL database on local network

[StrangerInBeijing]

I use WAMP on both my Development Laptop (localhost) and the Development server (devsvr) (Just a Winxp machine running wamp).
Site and database works fine on both.

But need dev laptop's copy of site to connect to database on development server. Tried switching off firewall, open port 3306, etc, not luck.

My db class use the constants as follows:

define("DB_SERVER", "localhost");
define("DB_USER", "root");....connects fine
define("DB_SERVER", "devsvr");
define("DB_USER", "root");...Could not connect to database. Error No:1130
define("DB_SERVER", "devsvr:3306");
define("DB_USER", "root");...Could not connect to database. Error No:2005
define("DB_SERVER", "192.168.1.16");
define("DB_USER", "root");....Could not connect to database. Error No:1130
define("DB_SERVER", "192.168.1.16:3306");
define("DB_USER", "root");...Could not connect to database. Error No:2005

Any suggestions? for once miss ms sql server...lol