Sound problems

Hi, a while ago I re-installed my operating system (windows xp) and GW, but the sound of GW isn't as it used to be. Outside of GW the sound works just fine, but when I play GW I can't hear some of the sounds the game should make. For example, I can't hear my character attacking and hitting things, and I can't hear other things that are going on in the game, except things that are happening behind my character, right where the game "camera" is, so to say. I can hear the game music and cinematics dialogue though, but not the music in the cinematics. So, it's like I can hear some sounds, but not others, and it's pretty annoying. Does anyone have any idea of what I can do for the sound to go back to normal?

First check the options section to make sure the effects slider is not all the way to the left. Then, make sure that you upgrade your sound drivers to the version you had before you did your clean install. That's what I had to do.