<ext:ComboBox Disabled="true" ID="cmbEmployeeType" StoreID="StoreEmployeeType" runat="server" Width="270"                                                Editable="true" DisplayField="vEmployeeTypeName" ValueField="vEmployeeTypeID"
                                                TypeAhead="true" Mode="Local" ForceSelection="true" TriggerAction="All" Select&#111;nfocus="true">
                                            </ext:ComboBox>
                                            <ext:Checkbox ID="chkEmployeeType" runat="server" LabelStyle="font-size: 11px;" BoxLabel="All" HideLabel="true">
                                                <Listeners>
                                                    <Check Handler="#{cmbEmployeeType}.Enabled();"/>
                                                </Listeners>
                                            </ext:Checkbox>



I use above code to enable cmbEmployeeType combobox. But its not working. Please help me.