i got a modalpanel with a datatable and a datascroller.

every time the datascroller is clicked i got a full subimt on the page.

do you see why?

<?xml version="1.0" encoding="ISO-8859-1"?>
<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:rich="http://richfaces.org/rich"
 xmlns:a4j="http://richfaces.org/a4j"
 xmlns:s="http://jboss.com/products/seam/taglib">
<link rel="stylesheet" type="text/css" href="resources/los_style.css" />
<rich:modalPanel id="weiterleitendlg" autosized="true" rendered="true" >
 <f:facet name="header">
 <h:panelGroup>
 <h:outputText value="Zuständigkeit setzen"></h:outputText>
 </h:panelGroup>
 </f:facet>


 <br />

 <h:form id="selectactorfrm">

 <h:inputText id="selmember" value="#{Session.membername}" styleClass="outputtext_read"
 style="width:280px">
 </h:inputText>

 <rich:suggestionbox width="270" height="#{Session.suggestListHeight}"
 usingSuggestObjects="true" id="selectlist" for="selmember"
 suggestionAction="#{Session.suggestMember}" var="s"
 fetchValue="#{s}" shadowOpacity="4"
 border="1" minChars="2"
 shadowDepth="4" cellpadding="2" >
 <h:column>
 <h:outputText value="#{s}" styleClass="outputtext_read" />
 </h:column>

 </rich:suggestionbox>
 <br />
 <br />
 <rich:separator></rich:separator>
 <br />
 <rich:dataTable value="#{Session.members}" var="m" id="membertable"
 onRowMouseOver="this.style.backgroundColor='#F1F1F1'"
 onRowMouseOut="this.style.backgroundColor='#{a4jSkin.tableBackgroundColor}'"
 cellpadding="0" cellspacing="0" columnsWidth="10%,85%" rows="10"
 width="100%" border="0" columns="2">
 <a4j:support event="onRowClick" reRender="selmember">
 <a4j:actionparam name="membername"
 assignTo="#{Session.membername}" value="#{m}">
 </a4j:actionparam>
 </a4j:support>
 <f:facet name="header">
 <rich:columnGroup>
 <rich:column colspan="1" style="text-align:left;" >
 <h:outputText value="Benutzer" styleClass="toolbartext" />
 </rich:column>
 <rich:column colspan="1" style="text-align:left;">
 <h:outputText value="Name" styleClass="toolbartext" />
 </rich:column>

 </rich:columnGroup>

 </f:facet>
 <rich:columnGroup>
 <rich:column colspan="1">
 <center><h:graphicImage value="/icons/user.png"></h:graphicImage>
 </center>
 </rich:column>
 <rich:column colspan="1" >
 <h:outputText value="#{m}" styleClass="outputtext_read" />
 </rich:column>


 </rich:columnGroup>



 </rich:dataTable>
 <rich:datascroller align="left" for="membertable" maxPages="20"
 page="#{Session.memberscrollerPage}" id="scroller1" />
 <rich:spacer height="30" />
 <div>
 <a4j:commandButton id="selectactorok" value="Ok" immediate="false"
 oncomplete="Richfaces.hideModalPanel('weiterleitendlg');"
 reRender="wfindexform" styleClass="rich-button" style="width:90px;float:left;"
 action="#{Session.weiterleiten}" >
 </a4j:commandButton>
 <a4j:commandButton id="selectactorcancel" value="Abbrechen" immediate="true" style="width:90px;float:right"
 oncomplete="Richfaces.hideModalPanel('weiterleitendlg')"
 styleClass="rich-button" >
 </a4j:commandButton>
 </div>
 </h:form>
</rich:modalPanel>
</ui:composition>