Add Admin menu not sucess issue

Add menu in config.xml but not display in admin menu problem

in

<adminhtml>
       <menu>
          <webfitter_cexport>
                        <title>Custom Export</title>
                        <sort_order>15</sort_order>
                        <children>
                            <export>
                                <title>Export Product</title>
                                <sort_order>1</sort_order>
                                <action>CexportAdmin/export/index</action>
                            </export>
                        </children>
                    </webfitter_cexport>
       </menu>

</adminhtml>


==>
you must define

<menu>
<webfitter_cexport>

not !!!!!=>
<menu>
<admin>
<children>

<webfitter_cexport>

this is for ACL