Help me!SQLException: Connection refused!

Question

My codes:
<%@ page import="java.io.*"%>
<%@ page import="java.util.*"%>
<%@ page import="java.sql.*"%>
<%@ page import="javax.servlet.*"%>
<%@ page import="javax.servlet.http.*"%>
<%
try{
Class.forName("oracle.jdbc.driver.OracleDriver");
}catch (ClassNotFoundException e){
out.println("Could not load the driver");
String url="jdbc:oracle:thin:@172.10.100.6:1521:TEST";
Connection con=DriverManager.getConnection(url, "mxxh", "123456");
Statement stmt = con.createStatement();
String query =     "CREATE TABLE COFFEES" +
          "(COF_NAME VARCHAR(32),"+
          "SUP_ID INTEGER,"+
          "PRICE FLOAT,"+
          "SALES INTEGER,"+
          "TOTAL INTEGER)";
stmt.executeUpdate(query);
out.println("table coffees created");
%>
Error:
SQLException: Io Exception: Connection refused(DESCRIPTION=(TMP=)(VSNNUM=135290880)(ERR=12504)(ERROR_STACK=(ERROR=(CODE=12504)(EMFI=4))))

Answer 1

ok, I searched the http://www.oracle.com for the error code = 12504 and this is what i got
http://technet.oracle.com/doc/server.804/a58312/newch254.htm
says that SID is missing