Xonar d2x sample rate in control panel not saved.

hello guys.
im using win8.1 and i am having bit problem with Xonar d2x settings.in control panel .i have selected 6 channesl and want to choose DTS with sample rate 192khz.but after restart sample rate comes back to 44khz,
i have already try to change settings i control panel -sound-properties-advance and choose 192000hz..but after restart same problem..its goes back to 44khz. i tried uninstalling and tried beta version of win8.1 but no success.
so plz whats the solution,thx in advance

16 bit, 44.1Khz wave file is the "CD standard" audio rate. Anything above that will not really make things sound better, only increase the size of music files.

I have a recording studio and record 24 bit, 44.1Khz but when I mix down to the final music song file it is 16 bit 44.1Khz. I can record higher but it only greatly increases the size of the sound files and nothing else.

thx for replying and im sorry for replying late,,i've been very very busy..well with all due respect to your recording studio and your experience i tried again and tried to figure the difference and i didn't have to try hard.Means difference was obvious and even my son could differentiate between 192lhz and 44 khz.actually i have onkoyo home system and i use DTS.but really difference can be heard very easily between two.as i said earlier i been very busy,and i wouldn't just ask for a problem which is minor for me.