Problemas em paginação

<%@page language="java" import="database.Conexao"%>
<%@page import="java.sql.*"%>
<%@page contentType="text/html" pageEncoding="iso-8859-1"%>

<%

String parametro = request.getParameter("pr");

   if (parametro == null) {
        response.sendRedirect("paginacao.mc?pr=0");
   } else {

int limitePorPagina = 5; 
        String pr1 = request.getParameter( "pr" );
        try{ 
            //Class.forName( "com.mysql.jdbc.Driver" ).newInstance(); 
                    
    Connection  conn = Conexao.getConexao();
    PreparedStatement pstmt = null;
    ResultSet rs = null;

         pstmt = conn.prepareStatement( "SELECT *, count(*) as c FROM noticias LIMIT " + 
                 pr1 + "," + String.valueOf( limitePorPagina ));
         rs = pstmt.executeQuery();
         rs.next();
          
        int totalregs = Integer.parseInt( rs.getString( "c" ) ); 
        int totalpgs = Math.round( totalregs / limitePorPagina ); 
        if( ( totalregs % limitePorPagina ) > 0 ) totalpgs++;
        int pr = Integer.parseInt( request.getParameter( "pr" ) );
        
        %>
        <% while( rs.next() ) {
            String id = rs.getString( "id" ); 
        String nm = rs.getString( "title" ); 
        String mail = rs.getString( "noticia" );
        %> 
        <%=id%> | <%=nm%>| <%=mail%>
        <br> <% } %>
        <% if( pr > 0 ){ %>
        [<a href="?pr=0">Primeira Página</a>] 
        [<a href="?pr=<%=pr-limitePorPagina%>">Anteriores</a>] 
        <% } %>
        <% if( pr < ( totalpgs * limitePorPagina ) - limitePorPagina ) { 
            %> [<a href="?pr=<%=pr+limitePorPagina%>">Próximo</a>] 
            [<a href="?pr=<%=( totalpgs * limitePorPagina ) - limitePorPagina%>">
            Ultima</a>] 
            <% } 
        } catch (SQLException sqlex) {
            out.println(sqlex);
        }
        
        }
%>