Flash Videos , Audio output Problem

Okay I have a 6 speaker setup, 2 speakers plugged into each of the three outputs (Realtek High Definition Audio). Whenever I play flash videos like on youtube etc only the 2 primary speakers work. Is there anyway that all the 6 speakers would work on youtube etc ?

Youtube doesn't support multi-channel audio. The max that they support over Flash files are 2 channels.

It also depends on the sound driver and sound card surround software settings. As I can select 5.1 or 2 speakers in the Creative Surround Mixer, and then no matter if its songs or flash video, all the 5.1 (6 speakers) channels are used. You might check that option too.