Web Report: JSP + Crystal Report

[neltan]

Hi,
I'm now testing on the Crystal Report - Report Application Server with JSP. Hope that one of the JSP developers can give me advise.

I encounter problem with this line:
viewer.processHttpRequest(request, response, application, out);

and get this error:
org.apache.jasper.JasperException: (class: com/crystaldecisions/xml/serialization/XMLObjectSerializer, method: setHandler signature: (Lcom/crystaldecisions/xml/serialization/CrystalSAXParserHandlerV) Incompatible object argument for function call

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JavaDoc

public final void processHttpRequest(javax.servlet.http.HttpServletRequest request,
javax.servlet.http.HttpServletResponse response,
javax.servlet.ServletContext context,
java.io.Writer out)
throws com.crystaldecisions.report.web.ReportSDKExceptionBase

Reference Website

http://www.crystaldecisions.com/products/dev_zone/java/default.asp

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My Setting:
j2sdk1.4 + tomcat 4.1.12 + win xp

webapp is the sample webapps "xtreme" from crystal report website

RAS running on IIS of same PC
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Question:
1. Why fail?
2. When CR9 RAS launch? I can't find much resources from the web? It seems little java developer work on RAS.
3. What kinds of web report you would use other than crystal report?