help i can't get dts!!

[Sharif]

i have the logitech z506 (recently bought)

when i played a music/sample file which is 6 channels it runs fine

but all the video 6 channels files only work in stereo

those video clips on you tube works fine in 5.1

i downloaded some sample which are 5.1 but they also play in stereo

please help

 

When i run the tests in the driver they perfectly work fine

 

update  found out its a problem with mpc but how do i fix it

[Sharif]

update i fixed it by reinstalling k lite codec pack and choosing 5.1 when installing