AC3 5.1 question

Hello everybody,


I just downloaded The Matrix, a two cd version in AC3 5.1 .

I just checked and it is a true 5.1 but I don't understand very well.
5.1 doesn't mean that the sound effects and the voice is set out in all the 5 speakers ?

When I watch the movie, the music come from all the speakers, but the sound effects and the voice come only from the front center speaker.

And another anoying thing is that the volume is very low, not loud at all.

I m using the AC3 Filter 0.68b and I have set it to SPDIF. The 5.1 speakers setting does the same thing.

Am I doing something wrong, or all the AC3 movies are like this: sound effects and voices only in the front channel ??

If so, then it sucks...

THanks for help !