Hello
I have some problems with scrollableDataTable

<r:scrollableDataTable rowKeyVar="rkv" frozenColCount="1"
 height="400px" width="700px" id="travelMedicinesList" rows="40"
 value="#{patientEditBean.patient.travelMedicines}" columnClasses="col"
 var="travelMedicine" sortMode="single">

 <r:column id="description">
 <f:facet name="header">
 <h:outputText styleClass="headerText" value="Description" />
 </f:facet>
 <h:outputText value="#{travelMedicine.reason.description}" />
 </r:column>

 </r:scrollableDataTable>

but it displays only white rectangle and nothing else.
(there is no error in patientEditBean.patient.travelMedicines)