java에서 informix connect를 할려고 하는데 컴파일은 되고

실행에서 아래 exception이 발생하는데 왜 그럴까요.

java.sql.SQLException: Attempt to connect to database server (Java socket except

ion encountered:연결이 거부됨) failed.

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driverName = "com.informix.jdbc.IfxDriver";

url = "jdbc:informix-sqli://localhost:1533/test:";

server = "kkk";

user = "informix";

password="informix";

Properties params = new Properties();

params.put ("informixserver",server);

params.put ("user",user);

params.put ("password",password);

try {

Class.forName ( driverName );

dbConn = DriverManager.getConnection ( url, params );

} catch ( Exception e ) {

System.out.println(e);

}

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