Sound Card

My sound card is an old creative audigy 2.  It was working fine but now after a while it just stops working and requires a restart to fix the problem.  I did not change the drivers or any thing just started doing it so I reinstalled the latest driver and it still does it.  Any ideas?   

edit does it make a difference when if I use it in 192hz or 96hz?  Because I use it in 192