Warning: Servlet action is currently unavailable

Sir,
I have developed a web application by using struts 1.2 and it is working fine on my local system with windows environment and my local tomcat web server. But, when i tried to run it on stax environment (by following the ways discussed in help materials on stax.net), the home page is coming but if i click on any hyperlink, a blank page is being displayed and stax console is displaying the following warning message:
     "org.apache.catlina.core.ApplicationDispatcher invoke
     WARNING: Servlet action is currently unavailable."
I am attaching the folder structure of my application and I am using the following jar files in lib folder.
1) activation.jar
2) commons-beanutils.jar
3) commons-digester.jar
4) commons-fileupload-1.2.jar
5) commons-io-1.4.jar
6) commons-logging.jar
7) jstl-1.2.jar
8) mail.jar
9) mysql-connector-java-5.0.3-bin.jar
10) pager-src.jar
11) pager-taglib.jar
12) quartz.jar
13) servlet-api-2.5.jar
14) struts.jar
15) struts-legacy.jar

I am not getting the reason of such absurd behavior of my application on stax sdk.
One thing I want to mention that I have defined the database connection in java file instead of datasource tag in strutsconfig.xml file