i have a problem regarding rich:datagrid/a4j:mediaoutput.

i am using jsf2 and richfaces.

my code is as follows

  <h:panelGrid columns="2" columnClasses="top,top">

            <rich:fileUpload fileUploadListener="#{fileUploadBean.listener}"

                maxFilesQuantity="#{fileUploadBean.uploadsAvailable}"

                id="upload"

                immediateUpload="#{fileUploadBean.autoUpload}"

                acceptedTypes="jpg, gif, png, bmp" allowFlash="#{fileUploadBean.useFlash}">

                <a4j:support event="onuploadcomplete" reRender="info" />

            </rich:fileUpload>

            <h:panelGroup id="info">

                <rich:panel bodyClass="info">

                    <f:facet name="header">

                        <h:outputText value="Uploaded Files Info" />

                    </f:facet>

                    <h:outputText value="No files currently uploaded"

                        rendered="#{fileUploadBean.size==0}" />

                    <rich:dataGrid columns="1" value="#{fileUploadBean.files}"

                        var="file" rowKeyVar="row">

                        <rich:panel bodyClass="rich-laguna-panel-no-header">

                            <h:panelGrid columns="2">

                                <a4j:mediaOutput element="img" mimeType="#{file.mime}" session="false"

                                    createContent="#{fileUploadBean.paint}" value="#{row}"

                                    style="width:100px; height:100px;" cacheable="false">

                                    <f:param value="#{fileUploadBean.timeStamp}" name="time"/>

                                </a4j:mediaOutput>

                                <h:panelGrid columns="2">

                                    <h:outputText value="File Name:" />

                                    <h:outputText value="#{file.name}" />

                                    <h:outputText value="File Length(bytes):" />

                                    <h:outputText value="#{file.length}" />

                                </h:panelGrid>

                            </h:panelGrid>

                        </rich:panel>

                    </rich:dataGrid>

                </rich:panel>

                <rich:spacer height="3"/>

                <br />

                <a4j:commandButton action="#{fileUploadBean.clearUploadData}"

                    reRender="info, upload" value="Clear Uploaded Data"

                    rendered="#{fileUploadBean.size>0}" />

            </h:panelGroup>

        </h:panelGrid>

my fileUploadListener works  works fine but the only problem is a4j:mediaOutput paint() is no getting called.

but the

<h:outputText value="File Name:" />

                                    <h:outputText value="#{file.name}" />

                                    <h:outputText value="File Length(bytes):" />

                                    <h:outputText value="#{file.length}" />

prints the filename and the file length. only the image is not getting displayed.

i am getting this following exception

javax.faces.FacesException: Error decode resource data

          at org.ajax4jsf.resource.ResourceBuilderImpl.decrypt(ResourceBuilderImpl.java:627)

          at org.ajax4jsf.resource.ResourceBuilderImpl.getResourceDataForKey(ResourceBuilderImpl.java:371)

          at org.ajax4jsf.resource.InternetResourceService.serviceResource(InternetResourceService.java:156)

          at org.ajax4jsf.resource.InternetResourceService.serviceResource(InternetResourceService.java:141)

          at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:508)

          at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)

          at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

          at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)

          at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)

          at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

          at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)

          at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)

          at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)

          at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)

          at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)

          at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)

          at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)

          at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)

          at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)

          at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)

          at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)

          at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)

          at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598)

          at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)

          at java.lang.Thread.run(Unknown Source)

Caused by: java.util.zip.DataFormatException: invalid bit length repeat

          at java.util.zip.Inflater.inflateBytes(Native Method)

          at java.util.zip.Inflater.inflate(Unknown Source)

          at java.util.zip.Inflater.inflate(Unknown Source)

          at org.ajax4jsf.resource.ResourceBuilderImpl.decrypt(ResourceBuilderImpl.java:621)

          ... 24 more

can anyone help me with this pls