bs player & aac format

I have a matroska file, Bs player shows me the subtitles and the video but i can't hear the sound.
With Video toolbox I can see the sound is aac.
I can hear it using other players like Media Player Classic but not with BS player.
Anyone got an idea ?

Thanks

[Garet_Jax]

try to install that:
http://pessoal.onda.com.br/rjamorim/COREaacDS.zip
this is CoreAAC Direct Show Filter