Problem FLV Embed & Lightbox 2

Hi everybody,
I do have a small problem. Suddenly the dreaded “Get the latest Flash Player to see this player” appeared in IE and FF. The player worked fine in IE and FF a couple of days ago – and I already have the suggested code in my header.php. But I don’t find it in my source page.

Any suggestions as to what mistake I might have made? http://www.voilamaxime.net

Thanks,

Eric