Sudden disconnection - VCI-400 and Macbook Pro

Lately my VCI-400 has suddenly been disconnecting from Traktor out of nowhere during my gigs. I will be playing to a full club and not even touching the booth and suddenly the macbook losing connection with the soundcard (aka VCI-400) and the music cuts out for 30 seconds, the club starts screaming and then it suddenly comes back on. This is becoming an ongoing issue. Has anyone else had this happen?

I should add that the VCI-400 is powered to an external source via AC adapter and does not lose power, the connection to the Macbook is just lost.

Hey I have the ean Golden edition running Traktor. Fully optimized /Haven't had a problem yet. Haha but seriously Maybe I can help, Which MacBook Pro are you using? Controller firmware and updated? Traktor or serato?