Tiles+Ajax in JSF

[Bhawana Tiwari]

Hi,
i've been trying to integrate Tiles to my JSF Project. One of the pages has <a4j> tags in it. But as soon as i integrate Tiles, the same page starts giving a NullPointerException( at org.ajax4jsf.io.parser.FastHtmlParser.parse(FastHtmlParser.java:89))

Note : All other pages are working fine after Tiles Integration, also this Ajax page was working properly before.
Not getting any clue where the problem is...Please help.

The entire stackTrace is,
0000002a WebApp E SRVE0026E: [Servlet Error]-[Faces Servlet]: java.lang.NullPointerException
at org.ajax4jsf.io.parser.FastHtmlParser.parse(FastHtmlParser.java:89)
at org.ajax4jsf.io.parser.FastHtmlParser.parseHtml(FastHtmlParser.java:229)
at org.ajax4jsf.framework.ajax.xmlfilter.FilterServletResponseWrapper.parseContent(FilterServletResponseWrapper.java:613)
at org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:271)
at org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:277)
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:142)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:121)
at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:147)
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:142)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:121)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:82)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:759)
at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:89)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:1924)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:89)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:472)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:411)
at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:101)
at com.ibm.ws.tcp.channel.impl.WorkQueueManager.requestComplete(WorkQueueManager.java:566)
at com.ibm.ws.tcp.channel.impl.WorkQueueManager.attemptIO(WorkQueueManager.java:619)
at com.ibm.ws.tcp.channel.impl.WorkQueueManager.workerRun(WorkQueueManager.java:952)
at com.ibm.ws.tcp.channel.impl.WorkQueueManager$Worker.run(WorkQueueManager.java:1039)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java(Compiled Code))

jars used :
myfaces-impl-1.1.5.jar
myfaces-api-1.1.5.jar
tomahawk-1.1.6.jar
struts-1.2.8.jar
ajax4jsf-1.1.1.jar

Java Platform : jdk 1.4

Thanks in advance!!