Your web.xml didn't declare which version. Assuming its' servelet 2.5 JavaEE 5:
<servlet-name> should come before <url-pattern>. For non-top-level elements in web.xml, orders do matter. That probably have caused the error you were seeing.
<taglib> is no longer a top-level element. Move it to <jsp-config>. I modified your web.xml and validated it:
<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app version="2.5" xmlns="
http://java.sun.com/xml/ns/javaee" xmlns:xsi="
http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="
http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<servlet>
<servlet-name>SwitchBoard</servlet-name>
<servlet-class>net.storta.web.SwitchBoard</servlet-class>
</servlet>
<servlet>
<servlet-name>LOGIN</servlet-name>
<servlet-class>net.storta.web.LOGIN</servlet-class>
</servlet>
<servlet>
<servlet-name>CheckSession</servlet-name>
<servlet-class>net.storta.web.CheckSession</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>SwitchBoard</servlet-name>
<url-pattern>/private/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>LOGIN</servlet-name>
<url-pattern>/LOGIN/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>CheckSession</servlet-name>
<url-pattern>/CheckSession/*</url-pattern>
</servlet-mapping>
<jsp-config>
<taglib>
<taglib-uri>/WEB-INF/lib/rssutils.tld</taglib-uri>
<taglib-location>/WEB-INF/lib/rssutils.tld</taglib-location>
</taglib>
</jsp-config>
</web-app>
-cheng
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