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CC8531: Please help me why my CC8531CC85XXDK-HEADSET doesn't work properly?

Part Number: CC8531

I have bought a CC85XXDK-HEADSET for testing the commnucaiton between the  CC8531 master and slave.

I did a good job in the beginning.

When I tried to flash them again by CCDEBUGGER in the PurePath Wirelss Configurator, the master and slave cannot work properply.

I have flashed them with "CC85XXDK-Headset(HS) Preload Demo" in the   PurePath Wirelss Configurator.

I am sure the master and slave is paired right for the LED on the master side is lit constanty,

 However my audio stream plugged into the master cannot be heard on the slave side.

Please help me on this side, do you have a configuration file for CC85XXDK-HEADSET master and slave  that worked right I could download?

Thank you!