DJM 900 - SRT - plays 5 seconds then fizzles out / cuts out / looses audio

Hello, I have newish - DJM 900SRT mixer thats at my home smoke free environment, with very lite usage. the mixer plays fine when not connected to Serrato, but then after 10 seconds playing, it sounds like the audio card fizzles and fades our, leaving serato on screen playing but "ZERO" audio coming out, even thou Serato reads "connected" to the mixer ..any thoughts?