Init failed due to :java.lang.ClassNotFoundException: oracle.jdbcdriver.OracleDriver HTTP JVM: java.lang.NullPointerException: null on Domino Web Server

I am getting error java.lang.ClassNotFoundException for oracle.jdbc.driver.OracleDriver.I have classes12.jar in classpath as well as in domino i have this jar file under C:/Lotus/Domino.

I have not added any entry in notes.ini for

javaUserClasses for this oralce thin driver as i saw notes.ini only allows 255 char.

Can any body help me in running this servlet on Domino as as a standalone application it works fine. MY code is as below

import javax.servlet.*;

import java.io.*;

import javax.servlet.http.*;

import java.sql.*;

public class RegisterServletJdbc extends HttpServlet

{

	PreparedStatement ps; 

	public void init(ServletConfig config) throws ServletException 

	{ 

			try 

			{ 

					Class.forName("oracle.jdbc.driver.OracleDriver");

				    Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@172.16.105.119:1521:iasdb","scott","tiger");				

					String query = "insert into tempusers values(?,?,?)"; 

					ps = conn.prepareStatement(query); 

            

			} 

			catch(Exception e) 

			{ 

					System.err.println("Init failed due to :" + e); 

            

			} 

	} 

	public void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException 

	{ 

			response.setContentType("text/html"); 

			PrintWriter out = response.getWriter(); 

            

			String username = request.getParameter("username"); 

			String password = request.getParameter("password"); 

			String email = request.getParameter("email"); 

            

			out.println("<html><head><title>Status</title></head>"); 

			out.println("<body><i>The details u have entered are:</i>"); 

			out.println("<b><br>Username: " +username); 

			out.println("<b><br>Password: " +password); 

			out.println("<b><br>Email: " +email); 

			try 

			{ 

					ps.setString(1,username); 

					ps.setString(2,password); 

					ps.setString(3,email); 

					ps.executeUpdate(); 

					out.println("<br><h1>Thank you for registering</h1>"); 

                    

			} 

			catch(SQLException e) 

			{ 

					out.println("<br><h1>Sorry,registration failed.</h1>"); 

			} 

			out.println("</body></html>"); 

			out.close(); 

            

	} 

}

Please anybody knows solution ,give reply imm.thanks in advance

rgds

Anant