Integrating Crystal Report with Spring Framework - JSP - spring

Question

I am integrating my Crystal Report code with Spring Framework.
Initially I had developed simple web application with only jsps (without spring feature) and CRystal Reports are rendering properly. I had tested it with parameters and DB connection Also.
Now I am trying to integrate it with Spring framework. I did all necessary set-up.
Reports are rendering properly, with parameters and DB connection. But when I click on subreport link I am getting error.
"The viewer is unable to connect with the CrystalReportViewerServlet
that handles asynchronous requests. Please ensure that the Servlet and
Servlet-Mapping have been properly declared in the application's
web.xml file."
Also, images on reports are not displaying (showing cross).I tried to search on different forums but no luck.
Here is my web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"> <display-name>CRWeb1</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<context-param>
<param-name>crystal_image_uri</param-name>
<param-value>/reports/crystalreportviewers</param-value>
</context-param>
<context-param>
<param-name>crystal_image_use_relative</param-name>
<param-value>reports</param-value>
</context-param>
<servlet>
<description></description>
<display-name>reports</display-name>
<servlet-name>reports</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet- class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>reports</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<servlet>
<display-name>reports</display-name>
<servlet-name>CrystalReportViewerServlet</servlet-name>
<servlet-class>com.crystaldecisions.report.web.viewer.CrystalReportViewerServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>CrystalReportViewerServlet</servlet-name>
<url-pattern>/CrystalReportViewerHandler</url-pattern>
</servlet-mapping>
</web-app>
Thanks,
Sarika