DDJ-SB stops working

Hello, I am from Venezuela, buy a ddj-sb 3 weeks ago and am submitting the following fault with the controller. I use with Serato dj comienta work well then shortly after stops working, the audio continues playing but ddj-sb stops working. I disconnected the laptop then connect and it works fine, but after a short time again stop working, the 1.05 Firmware was updated. I hope you can help me I'm worried.

excuse my English. thank you very much ...