Please Help me

This is my last resort. I recently deleted the game and now i reinstalled it. I had this program when i first started that everytime a i enter the game, this buzzing static like noise comes. It happens wen the background music is playing, when i'm moving over selection of server and rooms and loudest when a gun fires(its deafening!). It went away, i can't remember if i did anything or if it went away by itself. But now since i reinstalled its back, i play almost 100% of the time and i can't hear ntn, can anyone plz help me?Also this disconnection error with the sticky wall is annoying and teh send error report. Lastly, everytime i go to my file location and double click crossfire, not the one with g4 box, it says xtrap error 02-0300-00000000-017. i have alot of probs as u can see e.e