java connect to MSSQL2k

Hi.

I am not able to load the driver for MSSQL2000 server, even I have put all
3
jar files, mssqlserver.jar, msutil.jar, msbase.jar in lib folder and have
tried to restart the tomcat.
I got ClassNotFoundException. How should I set the Class.forName?
My code,

 public DBConnect(String host, String dbname, String username, String
password)
 {
  //Load Drv
  try
  {
   Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
  } catch(ClassNotFoundException cnfe) {
   System.err.println(cnfe);
  }
  //Define the connection
  msSqlURL = "jdbc:odbc:" + dbname;
 }