Connecting to a database on a LAN

Question

I have developed a system and it runs well. The only problem is that, it can not run on the client machine accessing the server database on another machine. I suspect that my connection to the database may not be fit for a LAN batabase connection. Below is some of the code I use to connect to the database on a LAN, but I have put a static address here such that it is not difficult for you guys to get (understand) what I want to achieve.
try
                Class.forName("com.mysql.jdbc.Driver").newInstance();
                conn = DriverManager.getConnection("jdbc:mysql://12.4.6.34/mydatabasename","root","**************");
catch(Exception e)
           System.out.println(e);
              When the above code is run the below exception is thrown
** BEGIN NESTED EXCEPTION **
java.net.SocketException
MESSAGE: java.net.ConnectException: Connection refused: connect
STACKTRACE:
java.net.SocketException: java.net.ConnectException: Connection refused: connect
        at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:156)
        at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:284)
        at com.mysql.jdbc.Connection.createNewIO(Connection.java:2555)
        at com.mysql.jdbc.Connection.<init>(Connection.java:1485)
        at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)
** END NESTED EXCEPTION **
Last packet sent to the server was 16 ms ago.
debug:
BUILD SUCCESSFUL (total time: 1 minute 4 seconds)However if I put the IP Adress 127.0.0.1 instead of 12.4.6.34 or instead of any other non 127.0.0.1 address, the system runs perfectly. So the question is where am I going wrong in specifying the database on another machine.

Answer 1

Yes the database is running but being accessible, I
am not sure because I am not able to test
accessibilty over a LAN.Why not?
If you can help, the DBMS is
mysql. How do I make it accessible?Get a DB browser.