Java Database Connectivity (JDBC)

Hi guys,

one question that really seems to be very stupied, but I cannot get to work the following program:

import java.sql.*;
import java.text.*;
import java.util.*;
import javax.naming.*;
import javax.sql.*;


public class SQLClass{
	public static void main(String[] args){
		try{
			Class.forName("com.mysql.jdbc.Driver");
		}
		catch(ClassNotFoundException e){
			System.err.println("no driver class found!");
			e.printStackTrace();
			return;
			}
		Connection con = null;
	    try{
	    	con = DriverManager.getConnection("jdbc:mysql://localhost/MY_DB_NAME", "DB_USER_NAME", "DB_USER_PW");
	    }
	    catch(SQLException e){
	    	e.printStackTrace();
	    	return;
	    }
	    finally{
	    	if ( con != null )
	        try{ 
	        	con.close();
	        } 
	      	catch(SQLException e){ 
	      		e.printStackTrace(); 
	      	}
	    }
	  }
	}

the following components are installed in the listed locations:
xampp for windows 1.5.4a (inkl. MySQL 5.0.24a) at T:\Programme\xampp
connector/J (mysql-connector-java-3.1.7-bin.jar) at C:\
the above program at C:\

command line> echo %CLASSPATH% 

yields C:\mysql-connector-java-3.1.7-bin.jar, so the jar file is set in the CLASSPATH correctly
The MySQL is stared up (recognized by "netstat" as well as phpMyAdmin) and its the Database' name as well as the user rights are set appropriate.

command line (at C:\)>javac SQLClass.java

yields nothing (in other words class file becomes build correctly)
then

command line (at C:\)>java -cp . SQLClass

yields
no driver class found!
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at SQLHandling.main(SQLHandling.java:11)

can someone explaine me why???

I really got absolutely no clue, even the dependences of the used connector/j and the used mysql version holds...

thanks for your help

hth

Tom

PS: using java 1.4.2_13-b06 (but this shouldn't matter)