DDJ SB2 : Play button and Vinyl problem

Hi everyone (i'm french, sorry for mistakes)

Somtimes when I work with a DDJ SB2, some bugs appears :

The music stops and the Play Button makes nothing. I can only listen by push cues. The edge of the circle get the Vinyl fonction (It mussn't have it, you know it's for synchro)

Or second bug : The vinyl fonction doesn't work ! The part which is used to scratch, get the same fonction as the edge : to synchro

What can I do ? I won't see again these problems D: