MC 7000 and virtual dj not communicating

Hello there, I have denon mc 7000, virtual dj on macbook pro. I resently purchased denon mc 7000 about 5 weeks ago and its had happened about 4 times. After every few songs mc 7000 stops communicating with virtual dk, when I click with mouse on virtual dj then it works fine but not the reverse. I disconnected and connected everything and same thing happened, the next day it was all fine. Any help would greatly be appreciated. Thanks

Sounds like a USB connection issue. Have you tried a different cable?