Hello I use GXT 3.0.0-rc2. And I have problem with this layout

Code:
    <ui:with type="com.sencha.gxt.widget.core.client.container.HorizontalLayoutContainer.HorizontalLayoutData" field="centerLayoutData">
        <ui:attributes width="1" height="1" />
    </ui:with>


    <ui:with type="com.sencha.gxt.widget.core.client.container.HorizontalLayoutContainer.HorizontalLayoutData" field="sideLayoutData">
        <ui:attributes width="350" height="1" />
    </ui:with>


    <ui:with type="com.sencha.gxt.widget.core.client.ContentPanel.ContentPanelAppearance" field="contentPanelAppearance" />


<viewport>
           <container:HorizontalLayoutContainer>            <container:child layoutData="{centerLayoutData}">
                <gxt:FramedPanel ui:field="panel" headingText="Organizations" collapsible="true" addStyleNames="margin-10">
                            <grid:Grid />
                </gxt:FramedPanel>
            </container:child>
            <container:child layoutData="{sideLayoutData}">
                <gxt:ContentPanel headerVisible="false" bodyBorder="false" ui:field="organizationEditPanel"   appearance="{contentPanelAppearance}">
<container:AccordionLayoutContainer ui:field="con"/>
                    <gxt:button>
                        <button:TextButton ui:field="save" text="{messages.saveButton}" />
                    </gxt:button>
</gxt:ContentPanel>
</container:child>...
</viewport>
When contentPanelAppearance is com.sencha.gxt.widget.core.client.ContentPanel.ContentPanelAppearance its ok display button on screen, but when com.sencha.gxt.widget.core.client.FramedPanel.FramedPanelAppearance button not display on screen only body display.