Razer THX surround sound not working.

I just bought this headset : Razer Kraken 7.1 THX, and with the first time i tried it, it worked well with surround sound and everything.
After the surround test, Razer Synapse recommended me to restart my computer.
so i restarted my computer and tested surround once more, it worked! but.. after playing my game, and tested
the surround sound again and it did not work from there on.

Does anybody know whats happening. If this helps, (here is my pc components:)

Processor Intel(R) Core(TM) i5-4460 CPU @ 3.20GHz, 3201 Mhz, 4 Core(s), 4 Logical Processor(s)
System Model H81M-S2V (MotherBoard)
GPU Nvidia Geforce GTX 1060 6GB
RAM 12
System Type x64-based PC
Windows 10
Version of operating system 10.0.17763 Build 17763
System Manufacturer Gigabyte Technology Co., Ltd.

Please help, Thank's.