YouTube won't autoplay

My client insists on autoplay but I can’t get it to work!
I’ve set the flag and the autoplay=”1″ appears in the html source but the video still appears with the little “Play” arrow.

Anything simple that I’ve forgotten?

Source:
object id=”vvq-6-youtube-1″ width=”480″ height=”300″ type=”application/x-shockwave-flash” data=”http://www.youtube.com/v/ls2suCdruIk&rel=0&fs=0&showsearch=0&showinfo=0&autoplay=1&#8243; style=”visibility: visible;” (removed <>)

http://www.worknet.co.uk

http://wordpress.org/extend/plugins/vipers-video-quicktags/