problems of admin console!

[ruikaka16]

i use adminconsole to config my database connection with oracle , input some parameters and press test button, showing message like "Transport error - HTTP code: 404 for URL:http://127.0.0.1:8888/test/sc/IDACall"

the web.xml like :

<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
         version="2.4">



    <!-- Note: The servlets/filters referenced here are documented in the SDK javadoc -->
     <context-param>
        <param-name>ORACLE_CONFIG</param-name>
        <param-value>/WEB-INF/classes/server.properties</param-value>
    </context-param>
    
    

    <!-- //>FileLoader -->
    <!-- Dynamic Compression -->
    <filter>
        <filter-name>CompressionFilter</filter-name>
        <filter-class>com.isomorphic.servlet.CompressionFilter</filter-class>
    </filter>
    <!-- CompressionFilter for dynamic compression -->
    <filter-mapping>
        <filter-name>CompressionFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <!-- //<FileLoader -->


    <!-- The IDACall servlet handles all Built-in DataSource operations -->
    <servlet>
        <servlet-name>IDACall</servlet-name>
        <servlet-class>com.isomorphic.servlet.IDACall</servlet-class>
    </servlet>
    
    <!-- The DataSourceLoader servlet returns Javascript representations of the dataSources whose
         ID's are passed to it - it is an alternative to using the <loadDS> JSP tag -->
    <servlet>
        <servlet-name>DataSourceLoader</servlet-name>
        <servlet-class>com.isomorphic.servlet.DataSourceLoader</servlet-class>
    </servlet>

    <!-- The FileDownload servlet downloads static files, like a webserver -->
    <servlet>
        <servlet-name>FileDownload</servlet-name>
        <servlet-class>com.isomorphic.servlet.FileDownload</servlet-class>
    </servlet>

    <!-- ISC init: initializes ISC framework -->
    <servlet>
        <servlet-name>Init</servlet-name>
        <servlet-class>com.isomorphic.base.Init</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet>
        <servlet-name>HttpProxy</servlet-name>
        <servlet-class>com.isomorphic.servlet.HttpProxyServlet</servlet-class>
    </servlet>

    <!-- The PreCache servlet initializes when the servlet engine starts up and pre-loads 
         data need for all client requests.  This is optional, and improves performance
         of the first few page requests.  PreCache cannot be invoked by a browser, because
         there is no "servlet-mapping" defined for it. -->
    <servlet>
        <servlet-name>PreCache</servlet-name>
        <servlet-class>com.isomorphic.servlet.PreCache</servlet-class>
        <load-on-startup>2</load-on-startup>
    </servlet>




    <!-- RPCManager uses this URL by default for Built-in DataSource operations -->
    <servlet-mapping>
        <servlet-name>IDACall</servlet-name>
        <url-pattern>/test/sc/IDACall/*</url-pattern>
    </servlet-mapping>

    <!-- DataSourceLoader requests -->
    <servlet-mapping>
        <servlet-name>DataSourceLoader</servlet-name>
        <url-pattern>/sc/DataSourceLoader</url-pattern>
    </servlet-mapping>

    <servlet-mapping>
        <servlet-name>HttpProxy</servlet-name>
        <url-pattern>/test/sc/HttpProxy/*</url-pattern>
    </servlet-mapping>

    <!-- Use FileDownload servlet to download all static content that's part of the skin, such as
         image files, so we can set Expires headers and other cache control directives.  In a
         production deployment, you'd want to use a webserver such as Apache to do this.  
    -->
    <servlet-mapping>
        <servlet-name>FileDownload</servlet-name>
        <url-pattern>/test/sc/skins/*</url-pattern>
    </servlet-mapping>

    <!-- serve ISC modules compressed, with expires headers -->
    <servlet-mapping>
        <servlet-name>FileDownload</servlet-name>
        <url-pattern>/test/sc/system/modules/*</url-pattern>
    </servlet-mapping>

    <!-- serve ISC development modules compressed, with expires headers -->
    <servlet-mapping>
        <servlet-name>FileDownload</servlet-name>
        <url-pattern>/test/sc/system/development/*</url-pattern>
    </servlet-mapping>

    <!-- server skin assets with expires headers -->
    <servlet-mapping>
        <servlet-name>FileDownload</servlet-name>
        <url-pattern>/test/sc/system/reference/skin/*</url-pattern>
    </servlet-mapping>

    <!-- General config -->
    <session-config>
        <session-timeout>30</session-timeout>
    </session-config>

    <jsp-config>
        <!-- Isomorphic JSP tags -->
        <taglib>
            <taglib-uri>isomorphic</taglib-uri>
            <taglib-location>/WEB-INF/iscTaglib.xml</taglib-location>
        </taglib>
    </jsp-config>

    <mime-mapping>
        <extension>csv</extension>
        <mime-type>text/csv</mime-type>
    </mime-mapping>

    <mime-mapping>
        <extension>manifest</extension>
        <mime-type>text/cache-manifest</mime-type>
    </mime-mapping>
    
</web-app>

appreciate for your reply!