first i want to say sorry for my bad english...

my problem:

i have got an aureon sky 5.1 sound card, which is connected optically over spdif to an reciever. if i play a dolby surround dvd it works without any porblems, the reciever plays dolby surround.

but if i try to play stereo mp3s with a plugin in 5.1 mode, it doesn't work. i also try some plugins:

-channel mixer
-pro logic wrapper II
-stereo to 4 channels


do you have solution for ma problem?