Repeat sample exception in seam

[valatharv]

I am trying to run Repeat sample in seam
http://livedemo.exadel.com/richfaces-demo/richfaces/repeat.jsf?c=repeat&tab=usage

I just copied the code from above link, is anything I am doing wrong ?? or is it issue with version... I am using "jboss-4.2.3", "jboss-seam-2.0.2.SP1"

but it gives the following error:
"Caused by: javax.el.ELException: /TestRepeat.xhtml @22,102 binding="#{updateBean.repeater}": java.lang.IllegalArgumentException: argument type mismatch
     at com.sun.facelets.el.TagValueExpression.setValue(TagValueExpression.java:101)
     at com.sun.faces.application.ApplicationImpl.createComponent(ApplicationImpl.java:250)
     ... 61 more
Caused by: java.lang.IllegalArgumentException: argument type mismatch
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)"

xhtml code:
----------
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
    xmlns:ui="http://java.sun.com/jsf/facelets"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:f="http://java.sun.com/jsf/core"
    xmlns:a="http://richfaces.org/a4j"   
    xmlns:rich="http://richfaces.org/rich">
   
    <h:form>
   
        <a4j:outputPanel id="table">
   
        <table border="1" class="dr-table rich-table">
            <thead class="dr-table-thead">
                <tr class="dr-table-header rich-table-header">
                    <th class="dr-table-headercell rich-table-headercell"><h:outputText value="Product Code" /></th>
                    <th class="dr-table-headercell rich-table-headercell"><h:outputText value="Proposed Price" /></th>
                    <th class="dr-table-headercell rich-table-headercell"><h:outputText value="Sales Cost" /></th>
                    <th class="dr-table-headercell rich-table-headercell" style="width: 150px"><h:outputText value="Reason" /></th>
                    <th class="dr-table-headercell rich-table-headercell"><h:outputText value="Proposed Gross Margin" /></th>
                </tr>
            </thead>
            <tbody>
                <a4j:repeat value="#{salesReport.items}" var="item" binding="#{updateBean.repeater}">
                    <tr>
                        <td align="center" class="dr-subtable-cell rich-subtable-cell">
                            <h:outputText value="#{item.productCode}" />
                        </td>
                        <td class="dr-subtable-cell rich-subtable-cell">
                            <h:inputText binding="#{updateBean.priceRef}"
                            immediate="false" value="#{item.proposedPrice}" size="7">
                                <a4j:support immediate="true" action="#{updateBean.change}"
                                    event="onchange" reRender="reason,margin" />
                            </h:inputText>
                        </td>
                        <td class="dr-subtable-cell rich-subtable-cell">
                            <h:outputText value="#{item.salesCost}" />
                        </td>
                        <td class="dr-subtable-cell rich-subtable-cell">
                            <h:selectOneMenu id="reason" required="true"
                                value="#{item.reason}">
                                <f:selectItems value="#{item.reasons}" />
                            </h:selectOneMenu>
                        </td>
                        <td class="dr-subtable-cell rich-subtable-cell">
                            <h:outputText id="margin"
                                value="#{item.proposedGrossMargin}">
                                <f:convertNumber pattern="$###0.000" />
                            </h:outputText>
                        </td>
                    </tr>
                </a4j:repeat>
            </tbody>
        </table>
        </a4j:outputPanel>
        <rich:messages />
    </h:form>

</ui:composition>


UpdateBean.java
---------------
package com.test;

import javax.faces.component.html.HtmlInputText;
import javax.faces.context.FacesContext;
import org.ajax4jsf.component.UIRepeat;
import org.jboss.seam.annotations.Name;

import java.util.HashSet;
import java.util.Set;

@Name("updateBean")
public class UpdateBean {

    HtmlInputText priceRef;
    private UIRepeat repeater;
    private Set<Integer> keys = null;
   
    /**
     * @return the keys
     */
    public Set getKeys() {
        return keys;
    }

    /**
     * @param keys the keys to set
     */
    public void setKeys(Set keys) {
        this.keys = keys;
    }

    public void setRepeater(UIRepeat repeater) {
        this.repeater = repeater;
    }

    public UIRepeat getRepeater() {
        return repeater;
    }

    public HtmlInputText getPriceRef() {
        return priceRef;
    }

    public void setPriceRef(HtmlInputText priceRef) {
        this.priceRef = priceRef;
    }
   
    public String change(){
       
        HashSet keys = new HashSet<Integer>();
        int rowKey = getRepeater().getRowIndex();
        keys.add(rowKey);
        setKeys(keys);
        priceRef.processValidators(FacesContext.getCurrentInstance());
        priceRef.processUpdates(FacesContext.getCurrentInstance());
        return null;
    }
}