Sound problems with realteck drivers

i have installed my realteck drivers yet the sound device manager will not allow me to use it as the loyeal driver

It keeps using NVIDEA HD audio driver and therfeore i can have no sound the volume bar is untouchable it is faded out then when i disable the NVIDEA device it says there is no device selected

help would be much appreciated iv tried several hours at this poblem :a

Have you got the MOBO’s original CD?..Install the onboard sound driver…Else get it from the Mobos website…