Hi,from belgium, 30y djing,play all party's most weddings en birthday party's for young and old,now i have the mc7000

troubble with mc 7000 the sound stops after 30min. playing the controler works when not yousing the soundcard from mc7000 so now playing music with soundcard from pc to line in from the mc7000 this works at the moment. does anyone had this problem? or can help me with this issue? thx davy