displaytag titleKey

Hi:

i need some help to configure the i18n for column title.

i'm using Struts and i have 3 diferent properties archives in one of this i have the message resources, i can't have access to this in my code i use this:

<display:table style="width: 100%" class="sortTable" sort="page" name="transaccionForm.trasacciones" cellpadding="0" cellspacing="0" pagesize="5" requestURI="/transacciones/listTransacciones.do" defaultorder="ascending" defaultsort="2" decorator="ar.com.osde.maf.common.Wrapper">
<display:column property="checkBox" title="&nbsp;" maxLength="50" />
<display:column property="nuemroTransaccion" titleKey="num.tran" sortable="true" maxLength="50" />
<display:column property="fechaFormateada" titleKey="Fecha" sortable="true" maxLength="50" />
<display:column property="descripcion" titleKey="transacc" sortable="true" maxLength="50" />
<display:column property="select" titleKey="motivo"/>
<display:column property="botDetalle" title="&nbsp;" />
<display:column property="botDatAd" title="&nbsp;"/>
</display:table>

but i can't reach the message.
and i don't know how to configure my displaytag.properties to point the specific file where my messajes are.

thanks

jelias3010