Live Stream Widget - Don't work

Hello,
i have a problem with Live Stream Widget, i have just purchease it, i run a Buddy Press 1.5.6 in my Wordpress Site, but when i activate the widget, i have this error in the right sidebar:

Fatal error: Call to undefined function get_blog_details() in /web/htdocs/www.lookdarifare.it/home/wp-content/plugins/live-stream-widget/live-stream.php on line 1040

how i can fix this? if i can't resolve this problem i must cancel my order :slight_frown:
Thanks a lot!

Andrea