No center in 5.1

[tadmaz]

I saw the post earlier relating to this, and my setup should be working according to that post. I am using AC3 filter .70b, and in PowerDVD and Windows Media Player 6.4 I get the center channel perfect. In BSPlayer, under audio streams, it is using the ac3filter, and under the monitor for outputs, it shows center active, but nothing is coming out??!!! Under SBlive, it says 6 channels too, so I am really clueless why it doesn't work in BSPlayer, even though AC3 filter is setup correctly...