VT1617/A Problem with Vista

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Hi Everybody, I recently installed MS Windows Vista Business Edition on pc and i noticed that 4.1 Speaker Configuration works only on 2 Speakers. I've even updated the appropriate from VIA for the sound chip but in vain and when I tested the speakers on someone else's VT1617 running under XP, it works correctly. The speaker configuration utility under control panel did't solved the problem neither. If someone finds a solution to this, plz let me know...thanks


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