How to filter instant with fulltextfilter?

It doesnot work!

<?xml version="1.0" encoding="UTF-8" standalone="no"?>























    <genericFilter id="genericFilter"
                   dataLoader="studentsDl">
        <properties include=".*"/>
    </genericFilter>
    <hbox id="buttonsPanel" classNames="buttons-panel">
        <button id="createButton" action="studentsDataGrid.create"/>
        <button id="editButton" action="studentsDataGrid.edit"/>
        <button id="removeButton" action="studentsDataGrid.remove"/>
        <simplePagination id="pagination" dataLoader="studentsDl"/>
    </hbox>
   <search:fullTextFilter dataLoader="studentsDl" searchStrategy="anyTermAnyField" autoApply="true"/>
    <dataGrid id="studentsDataGrid"
              width="100%"
              minHeight="20em"
              dataContainer="studentsDc"
              columnReorderingAllowed="true">
        <actions>
            <action id="create" type="list_create"/>
            <action id="edit" type="list_edit"/>
            <action id="remove" type="list_remove"/>
        </actions>
        <columns resizable="true">
            <column property="lastname"/>
            <column property="firstname"/>
        </columns>
    </dataGrid>
    <hbox id="lookupActions" visible="false">
        <button id="selectButton" action="selectAction"/>
        <button id="discardButton" action="discardAction"/>
    </hbox>
</layout>

image