Internal video rendering not working

[drconan85]

I use Media player classic home cinema 1.7.11.36 nighty built , and the sound is fine but I want to decrease the speed rate without affection the sound pitch so I read that you can change audio renderer to internal audio renderer but when I do that there is no sound and when I select filters> internal audio renderer status , it shows that there is no adapter , no processor as shown in the picture .. what is the problem ?
my laptop is MSI and I'm using windows 8.1