Datatable form submit problem

[trippccn]

I'm having a problem with a commandLink tag inside a datatable.

This works:

<h:form>
<h:commandLink action="#{memberDetail.getDetails}"><h:outputText value="test"/><f:param name="id" value="2"/></h:commandLink>
</h:form>

But this does not (it just refreshes the page):

<h:form>
<h:dataTable value="#{members}" var="mem" rendered="#{members.rowCount>0}">
 <h:column>
 <h:commandLink action="#{memberDetail.getDetails}"><h:outputText value="test"/><f:param name="id" value="2"/></h:commandLink>
 </h:column>
</h:dataTable>
</h:form>

Am I doing something obviously wrong?

Thanks,
Chad