[Plugin: SoundCloud Shortcode] widget not working on site

Hi there,
When I installed the widget and then put in the shortcode on the posts I want to embed Souncloud tracks on, all I get is a link that brings you to an error page. See the bottom of this post http://bus.zomppa.com/2012/04/03/barbecue-from-north-carolina-to-france/. The first shortcode inserted there is  [soundcloud url=”http://api.soundcloud.com/tracks/41642664″ iframe=”true” /].
Not sure what I am doing wrong there. I have no other soundcloud related plugins on the site.
Thanks

http://ww.wp.xz.cn/extend/plugins/soundcloud-shortcode/