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TPA6140A2 EVM driver

Other Parts Discussed in Thread: TPA6140A2YFFEVM

Hi all, I am new here. I got he TPA6140A2YFFEVM board, and installed GUI software. Then I connect the board's USB to my computer, and driver cannot be found.  In device manager, I can see a TIAudioI2C device, but when I update the driver and try to search automatically, no driver can be found.  I have tried Win7 64bit and 32bit, and also 32bit Win XP without luck. Am I doing anything wrong? 

Also, I have connected the USB (without software control, just power), input and output, and played audio, but there is no input, is that normal?   I am worrying that I have a faulty board.