Are you running a 32bit or 64bit windows 7 there ? Also which model of Logitech webcam are you trying ?
Also I would try updating Flash Player. Link below.
http://get.adobe.com/flashplayer/
Also make sure to go to windows update and to have the latest updates installed. Link below.
http://www.windowsupdate.com
Other thing you can do is go to logitech web site and make sure you are running the latest drivers for your web cam. Link below.
http://www.logitech.com/en-us/support-downloads
Also I remember the performer application requiring some Microsoft .Net framework files but i'm sure it states that on install from what I remember and contains a link where to get them from. Read the area where you downloaded it from on the site, It may state there where to get the right version of the Microsoft .Net framework you need and a download link.
If you're totally stuck and need assistance from the site use the link below it has ways you can contact the site.
http://broadcasting.vs.com/contact.php
Regards
Nabil
Quote