Create a "category page top" position

[ilearnbydoing]

    <reference name="after_body_start">
        <block type="bannerslider/bannerslider" name="catalog.page.top" >
            <action method="setBlockPosition">
                <block_position>catalog-page-top</block_position>
            </action>
            <action method="setCateBlockPosition">
                <cateblock_position>category-page-top</cateblock_position>
            </action>
        </block>
    </reference>

with above xml code in layout I am trying to create a new position on top on category page but it is not working.

Anybody know how to create a new position ?