Domino /JSP tag

I have a login and dologin page when the user enter the a wrong password/username i want to come back to the login page. now it goes to the home .jsp page. but on the server console i get invalid usernae and password notes ecxeption error . can anyone help me?/

Login Page

<%@ taglib uri=“/WEB-INF/domutil.tld” prefix=“domutil” %>

<%@ page

language=“java”

contentType=“text/html; charset=ISO-8859-1”

pageEncoding=“ISO-8859-1”

%>

Log In
<domutil:if>

	<domutil:condition debug="true" onfailure="exception">

        <%= request.getParameter("lf") != null%>

            </domutil:condition>

    <left><font=red><b>Login Failure!</b></font></left>

    <p>

</domutil:if>



<domutil:if>

	<domutil:condition>

        <%= request.getParameter("ar") != null%>

    </domutil:condition>

    <center><b>Authorization Required.  Please Log In.</b></center>

    <p>

</domutil:if>
<TBODY>

	<TR>

		<TD>Username:</TD>

		<TD><input type="text" name="username"></TD>

	</TR>

	<TR>

		<TD>Password:</TD>

		<TD><input type="password" name="password"></TD>

	</TR>

</TBODY>

doloin page:

<% try {

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

System.out.println("username:" + username);

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

System.out.println("password:" + password);

%>

	<domino:db host="" dbname="Table"

		dbserver="Test"

		user="<%=username%>"

		password="<%=password%>">

<% // Store the username into session context

session.setAttribute("l_fullname", request.getParameter("username"));

session.setAttribute("l_user", request.getParameter("username"));

session.setAttribute("l_pw", request.getParameter("password"));

session.setAttribute("l_admin", "0");

%>

		<domino:ifdbrole name="Admin">

<% session.setAttribute(“l_admin”, “1”); %>

		</domino:ifdbrole>

		

	</domino:db>

<%

    response.sendRedirect("index.jsp/home.jsp");

} catch (Exception e) {

	// flush current login info

	session.setAttribute("l_user", null);

	session.setAttribute("l_pw", null);

	session.setAttribute("l_admin", null);

response.sendRedirect("login.jsp?lf=1");	

}

%>