$show['fb_likebutton'] some help here please

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Am trying to get this to work in a few custom templates without luck tho
it will just not show what am i missing here?

<vb:if condition="$show['fb_likebutton']">
<div align="left">{vb:raw fblikebutton} </div>
</vb:if>

Thanks

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shameless bump :o