java.lang.ClassNotFoundException: org.sqlite.JDBC error on server

I added sqlite-jdbc-3.8.11.1.jar to my class path in the project. It worked in my class having a static main function like this below. This method is in Utilities class.

public static boolean getAuthResultV2(String userName, String pswd){
    boolean authRes = false;
    if(userName.length() > 0){
        CustAuth cust = new CustAuth();
        cust = cust.getCustAuthByUsrName(userName);
        if(cust != null){
            String usrPass = cust.getPassword();
            if(usrPass.equals(pswd)){
                authRes = true;
            }
        }
    }

    return authRes;
}


    public static void main(String[] args){

    if (getAuthResultV2("userx", "9999")){
        System.out.println("YES");
    }
    else{
        System.out.println("NO");
    }

In CustAuth class, I get info from DB like that

    public CustAuth getCustAuthByUsrName(String name){
       CustAuth tmpCustAuth = null;
       Connection c = null;
        Statement stmt = null;
        try {
          Class.forName("org.sqlite.JDBC");
          c = DriverManager.getConnection("jdbc:sqlite:admin.db");
          c.setAutoCommit(false);
          System.out.println("Opened database successfully");

          stmt = c.createStatement();
          ResultSet rs = stmt.executeQuery( "SELECT * FROM CUST_AUTH WHERE USER_NAME = '" + name + "';" );
          while ( rs.next() ) {
             tmpCustAuth = new CustAuth();
             String  pswd = rs.getString("PASSWORD");
             int custId = rs.getInt("OWN_CUST_ID");
             Date effT = rs.getDate("EFF_TIME");
             Date expT = rs.getDate("EXP_TIME");

             tmpCustAuth.userName = name;
             tmpCustAuth.password = pswd;
             tmpCustAuth.effTime = effT;
             tmpCustAuth.expTime = expT;

             System.out.println( "PASSWORD = " + pswd );
             System.out.println();
          }
          rs.close();
          stmt.close();
          c.close();
        return tmpCustAuth;
        } catch ( Exception e ) {
          System.err.println( e.getClass().getName() + ": " + e.getMessage() );
          //System.exit(0);
          return null;
        }


}

This works fine when I run the application Utilities. After that I remove my main function in Utilities and then want to use Utilities class in my servlet as shown below.

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    String userName = request.getParameter("userName");
    String pswd = request.getParameter("pswd");
    //Utilities ut = new Utilities();
    boolean authResult = Utilities.getAuthResultV2(userName, pswd);
    if(authResult){
        request.getSession().setAttribute("userName", userName);
        request.getSession().setAttribute("pswd", pswd);
        response.sendRedirect("loginSuccessPage.html");
    }
    else{
        response.sendRedirect("login.html");
    }

}

But when I run the application on local server I get java.lang.ClassNotFoundException: org.sqlite.JDBC error. It works fine in desktop application as I described above but it doesn't work in my web application. Could you please help me with it ? Thanks