primefaces datatable filtering - datatable

Question

I use the car example from primefaces site, but it works only one time and do not refresh values after onkeyup event. Can somebody help me?:) TOM
Code which I use(from tutorial):
<p:dataTable var="car" value="#{tableBean.carsSmall}"
emptyMessage="No cars found with given criteria"
widgetVar="carsTable">
<f:facet name="header">
<p:outputPanel>
<h:outputText value="Search all fields:" />
<p:inputText id="globalFilter" onkeyup="carsTable.filter()" style="width:150px" />
</p:outputPanel>
</f:facet>
<p:column filterBy="#{car.model}"
headerText="Model" footerText="contains"
filterMatchMode="contains">
<h:outputText value="#{car.model}" />
</p:column>
<p:column filterBy="#{car.year}"
headerText="Year" footerText="startsWith">
<h:outputText value="#{car.year}" />
</p:column>
<p:column filterBy="#{car.manufacturer}"
headerText="Manufacturer" footerText="exact"
filterOptions="#{tableBean.manufacturerOptions}"
filterMatchMode="exact">
<h:outputText value="#{car.manufacturer}" />
</p:column>
<p:column filterBy="#{car.color}"
headerText="Color" footerText="endsWith" filterMatchMode="endsWith">
<h:outputText value="#{car.color}" />
</p:column>
</p:dataTable>
</h:form>
and TableBean exactly like this in tut