always getting redirected to error page?

dear everyone and all,

I had looked for some reference and had added these code to the web.xml.

<web-app>

<security-constraint>

<web-resource-collection>

<web-resource-name>MemberSite</web-resource-name>

<url-pattern>/member/*</url-pattern>

</web-resource-collection>

<auth-constraint>

<role-name>member</role-name>

</auth-constraint>

</security-constraint>

<login-config>

<auth-method>FORM</auth-method>

<form-login-config>

<form-login-page>/login.jsp</form-login-page>

<form-error-page>/error.jsp</form-error-page>

</form-login-config>

</login-config>

</web-app>

I needed to access the database to verify if the user had the right to access the web page. I had make the following table:

User Table

Have the fields like user_name, user_pass, user_role.

And I had added these code to server.xml.

<Context path="/book" docBase="book" debug="0">

<Realm className="org.apache.catalina.realm.JDBCRealm" debug="99"

driverName="com.mysql.jdbc.Driver"

connectionURL="jdbc:mysql://127.0.0.1/book"

userTable="user" userNameCol="user_name" userCredCol="user_pass" roleNameCol="user_role" />

</Context>

I had added these code to the xml files. But, it always redirect to the error page. Which steps I had missed so that I cannot use the j_security_check to login the web page?

[1614 byte] By [senthil_yogaa] at [2007-11-27 9:52:56]