Sound Problem ?????????

Tweet

I hv installed d game NBA Live 2007 in my system. I can play it easily but d problem is dat dere's no sound i.e, although, I can hear every sound but d songs which come when ur not playing any game n d commentary sound while playing can't b heard. I hv increased all d sound volumes 2 max including d commentaries. Even, no sound error is displayed. Can any1 help me to sort dis 1 out ????????? Do tell me if u know. Thnx !!!!!