Tomcat 5.5, struts, AJAX - Works on localhost but not on online web-server

Hello,
I'm trying to add some functionality from Ajax to my client's web application. And I'm stuck on this problem for the past 4 days now.
To make a long story short, the application works perfectly on my localhost, but once I deploy it to the online server it pops a Page Not Found message (written in the JavaScript of Ajax engine). Though I have worked with servlets and struts a bit, I still consider myself very new.
Here are some specifications:
- The jar files are in tomcat-5.5/common/lib
- The servlets (compiled correctly) are in webapps/ROOT/WEB-INF/classes/javaClasses
- My web.xml and struts-config.xml are in WEB-INF, both of which I believe are configured correctly:
web.xml
=======
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN" "http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">
<web-app>
     <servlet>
          <servlet-name>action</servlet-name>
          <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
          <init-param>
          <param-name>config</param-name>
          <param-value>/WEB-INF/struts-config.xml</param-value>
          </init-param>
     </servlet>
     <servlet-mapping>
          <servlet-name>action</servlet-name>
          <url-pattern>*.do</url-pattern>
     </servlet-mapping>
     <welcome-file-list>
          <welcome-file>/index.jsp</welcome-file>
     </welcome-file-list>
</web-app>
struts-config.xml
==============
<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://jakarta.apache.org/struts/dtds/struts-config_1_2.dtd">
<struts-config>
<action-mappings>
<action path="/signup" type="org.apache.struts.actions.ForwardAction" parameter="/signup.jsp" />
<action path="/countries" type="javaClasses.GetCountries" />
</action-mappings>
</struts-config>
I noticed when I type "countries.do" on my localhost, the action is processed perfectly, however on the online server, it displays me the 404 error page.
I thought it wasn't seeing the struts-config.xml so I played around with the directory path struts-config.xml and replaced it with:
<param-value>/home/shaghig/webapps/ROOT/WEB-INF/struts-config.xml</param-value>
but still no luck.
What is it that I am not doing right? Any input or guidance would be very much appreciated.

Have you resolved your problem? I am running into the SAME EXACT issues with my application. The only difference is I'm not deploying to webapps/ROOT/; I'm deploying to my own directory based on my WAR file name (webapps/<web_application_name>/WEB-INF....blah blah). If you figured out your problem (believe me, I wish I could be of some help) I would LOVE to hear what you did/figured out.
-C

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