JDBC APPLET Problem

Dear Sir,
Now I try to run the Java Program by using JDBC
PostgreSql through Web Browser.
I set the file pg_hba.conf as

local all trust
host all 127.0.0.1 255.255.255.255 trust
host all 0.0.0.0 0.0.0.0 trust

and the java code as shown below .....

import java.sql.*;
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;

public class SampleApplet extends Applet implements
ActionListener
{
Connection conn;
Statement stmt;
String state_code;

private TextField Tinput;
private TextField Toutput;
private TextField Terror;

private Button sqlprocess;



public void init(){


try{ Class.forName ("org.postgresql.Driver");}
catch(Exception ex){
ex.printStackTrace();}

setFont(new Font("TimesRoman",Font.PLAIN,15));
setLayout(null);

Label Linput = new Label("Enter a state code: ");
Tinput = new TextField(10);
Label Loutput = new Label("Sql Output");
Toutput = new TextField(30);
Terror = new TextField(100);
sqlprocess = new Button("SqlQuery");

Linput.setBounds(10,30,150,30);
Tinput.setBounds(170,20,100,30);
Loutput.setBounds(10,80,100,30);
Toutput.setBounds(110,80,100,30);
Terror.setBounds(10,150,200,30);
sqlprocess.setBounds(50,210,80,30);

add(Linput);
add(Tinput);
add(Loutput);
add(Toutput);
add(Terror);
add(sqlprocess);

sqlprocess.addActionListener(this);

}

public void start() {
try{ conn =
DriverManager.getConnection("jdbc:postgresql://fmlhost.fml.t.u-tokyo.ac.jp/test","postgres","");
stmt = conn.createStatement();
}
catch(Exception ex){

ex.printStackTrace();
Terror.setText(ex.getMessage());
}
}

public void actionPerformed(ActionEvent ae) {

if(ae.getActionCommand()=="SqlQuery"){


state_code = Tinput.getText();

try{ ResultSet res = stmt.executeQuery( "Select
name "+"From statename "+"Where code =
'"+state_code+"'");
if(res!=null)
while(res.next())
{String state_name = res.getString(1);
Toutput.setText(state_name);}

res.close();
stmt.close();
conn.close();
}

catch(Exception ex){
ex.printStackTrace(); }


}

}


}

and I get the error message as

"No suitable driver"

Please advice me for this problem.

Thank you

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