Rainbow six vegas 2 sound problem?

I recently installed my vegas 2 for computer. With my knowlegde, I'm sure that nothing is wrong with my computer, but like when i play the game, my teammates and othe rnpcs doesnt make any sound. Their mouths move and the guns fire, but no gun sounds of talking can be heard. I thought my sound card was the... show more I recently installed my vegas 2 for computer. With my knowlegde, I'm sure that nothing is wrong with my computer, but like when i play the game, my teammates and othe rnpcs doesnt make any sound. Their mouths move and the guns fire, but no gun sounds of talking can be heard. I thought my sound card was the problem but like I'm the only person that makes sound. My orders can be heard and speeches and gunfire can beheard. Does anybody know whats wrong? Any assistance will be appreciated.
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