Sorting column problem

[ipazmino]

Hi,

I have a list I need to sort, but the headers' attributes in the <rich:column> tag don't seam to work.

the table is declared like this

<rich:dataTable value="#{inboxMessages}" var="inboxMsg" rows="5">

and the columns I want to be sorted by are

<rich:column id="dateCol" sortable="true" sortBy="#{inboxMsg.datetime}" sortOrder="DESCENDING">
 <f:facet name="header">
 <h:outputText value="Date"/>
 </f:facet>
 <h:outputText value="#{inboxMsg.datetime}" />
</rich:column>
<rich:column id="subjectCol" sortBy="#{inboxMsg.title}">
 <f:facet name="header">
 <h:outputText value="Subject" />
 </f:facet>
 <h:outputText value="#{inboxMsg.title}" />
</rich:column>

y also added to the rich:dataTable tag the attributes

sortMode="multi" sortPriority="dateCol,subjectCol"

but it doesn't work either.

When the view is rendered none of both headers display controls or allow me to order the columns. Why? Have I missed something?

Thanks in advance.