Sound problem

[MitaDC]

Hey I have my speakers connected to the comp i just built. I try to play my games and I can't hear any talking for ex: in Splinter Cell I can't hear talking all I can hear is my walking etc. , Nascar Season 2002 I can't hear my engine or my spotter and I can only hear some cars around me but if I get in a wreck I can hear all the tires squealing etc. Plz help I really wanna play my games :0)

what is your system specs? What os? Does regular sounds in windows work? Updated all the games? Have the latest sound drivers installed? in other words we need more info

[MitaDC]

K got a
2500xp
Chaintech 7-NJS mobo
512mb Ram
80gb HD
9500 128mb GC
X-superalien Case W/500watt psu

Windows XP
Regular windows sounds don't work but some game sounds do. I was just playing Battlefield1942 and the sound worked when I was getting on a server but when I got on the server there wasno more sound. I will try reinstalling sound drivers