HTTP ERROR: 500

I have this New user registration form. I user AccountBean to store data from a form. and check make sure all fields are fill. and process.jsp use that bean..and send to retry.jsp or to success.jsp..I also put both AccountBean.java and Its .class file in WEB-INF class folder but its going to this error:
HTTP ERROR: 500 Unable to compile class for JSPNote: sun.tools.javac.Main has been deprecated. An error occurred at line: 2 in the jsp file: /jsp/ac/process.jsp Generated servlet error: /var/tmp/Jetty_0_0_0_0_8888__group24_j2ee/jsp/ac/process$jsp.java:61: Class org.apache.jsp.AccountBean not found. AccountBean formHandler = null; ^ An error occurred at line: 2 in the jsp file: /jsp/ac/process.jsp Generated servlet error: /var/tmp/Jetty_0_0_0_0_8888__group24_j2ee/jsp/ac/process$jsp.java:64: Class org.apache.jsp.AccountBean not found. formHandler= (AccountBean) ^ An error occurred at line: 2 in the jsp file: /jsp/ac/process.jsp Generated servlet error: /var/tmp/Jetty_0_0_0_0_8888__group24_j2ee/jsp/ac/process$jsp.java:69: Class org.apache.jsp.AccountBean not found. formHandler = (AccountBean) java.beans.Beans.instantiate(this.getClass().getClassLoader(), "AccountBean"); ^ 3 errors, 1 warning

import java.util.*;
public class AccountBean {
  private String userName;
  private String password;
  private String firstName;
  private String lastName;
  private String cName;
  private String cAddress;
  private String city;
  private String state;
  private String zipCode;
  private String phone;
  private String fax;
  private String email;
  private Hashtable errors;
  public boolean validate() {
    boolean allOk=true;
if (userName.equals("")) {
      errors.put("userName","Please enter your User name");
      userName="";
      allOk=false;
}
    if (password.equals("") ) {
      errors.put("password","Please enter a valid password");
      password="";
      allOk=false;
}
    if (firstName.equals("")) {
      errors.put("firstName","Please enter your first name");
      firstName="";
      allOk=false;
    }
    if (lastName.equals("")) {
      errors.put("lastName","Please enter your last name");
      lastName="";
      allOk=false;
    }
if (cName.equals("")) {
      errors.put("cName","Please enter your Company name");
      cName="";
      allOk=false;
    }

if (cAddress.equals("")) {
      errors.put("cAddress","Please enter your address");
      cAddress="";
      allOk=false;
    }

if (city.equals("")) {
      errors.put("city","Please enter your city name");
      city="";
      allOk=false;
    }
if (state.equals("")) {
      errors.put("state","Please enter your state name");
      state="";
      allOk=false;
    }
    if (zipCode.equals("") || zipCode.length() !=5 ) {
      errors.put("zipCode","Please enter a valid zip code");
      zipCode="";
      allOk=false;
    } else {
      try {
        int x = Integer.parseInt(zipCode);
      } catch (NumberFormatException e) {
        errors.put("zipCode","Please enter a valid zip code");
        zipCode="";
        allOk=false;
      }
    }
if (phone.equals("")) {
      errors.put("phone","Please enter valid Phone number");
      phone="";
      allOk=false;
    }
if (fax.equals("")) {
      errors.put("fax","Please enter your fax number");
      fax="";
      allOk=false;
    }
    if (email.equals("") || (email.indexOf('@') == -1)) {
      errors.put("email","Please enter a valid email address");
      email="";
      allOk=false;
    }
    
    return allOk;
  }
  public String getErrorMsg(String s) {
    String errorMsg =(String)errors.get(s.trim());
    return (errorMsg == null) ? "":errorMsg;
  }
  public AccountBean() {
    userName="";
password="";
firstName="";
    lastName="";
cName="";
cAddress="";
city="";
state="";
zipCode="";
phone="";
fax="";
    email="";
errors = new Hashtable();
  }
  public String getUserName() {
    return userName;
  }
  public String getPassword() {
    return password;
  }
  public String getFirstName() {
    return firstName;
  }
  public String getLastName() {
    return lastName;
  }
  public String getCName() {
    return cName;
  }
  public String getCAddress() {
return cAddress;
  }
  public String getCity() {
return city;
  }
  public String getState() {
  return state;
  }
  public String getZipCode() {
    return zipCode;
  }
  public String getPhone() {
  return phone;
  }
  public String getFax() {
  return fax;
  }
  public String getEmail() {
    return email;
  }
  public void setUserName(String u) {
    userName=u;
  }
  public void  setPassword(String p) {
    password=p;
  }
  public void setFirstName(String fname) {
    firstName =fname;
  }
  public void setLastName(String lname) {
    lastName =lname;
  }
 public void setCName(String company) {
    cName =company;
  }
  public void setCAddress(String address) {
    cAddress =address;
  }
  public void setCity(String c) {
    city =c;
  }
  public void setState(String s) {
    state =s;
  }
  public void setZipCode(String z) {
    zipCode=z;
  }
  
  public void setPhone(String ph) {
    phone=ph;
  }
  public void setFax(String f) {
    fax=f;
  }
  public void setEmail(String eml) {
    email=eml;
  }
  public void setErrors(String key, String msg) {
    errors.put(key,msg);
  }
}

Try putting your bean into a package and importing the package in JSP.

i done that it is still giving me error that it cant find AccountBean..

Can you successfully able to compile Accountbean.java ?
if yes then check the path where you stored that file. And try using <useBean property='application/page' />