VAS is a virtual wrap of real sound card, so all sound card brands are supported, such as: Ad Lib, asus, Aureal, C-Media, Conexant, Diamond, IDT high definition audio, realtek, soundmax, etc. VAS even can work without real sound card.
I guess either you failed to install VAS driver(See below help) or VAS icon is hidden by Windows 7.
http://www.virtualaudiostreaming.net/faq.html#Remove%20virtual%20device%20not%20found%20Warning%20MessageIf you use Windows 7, the systray of VAS maybe be hidden by Windows. See:
http://www.online-tech-tips.com/windows-7/how-to-customize-the-system-tray-in-windows-7/
Also, please reinstall the VAS software to try.