crossdj 2.6 denn mc6000 will not start

when I open mix vibes its telling me that my denon mc6000 is not connected two options are retry or quit please help I cant get any further than this I have set the rear of denon to PC pcmix and ch1-4
im using win 7 Cross dj2.6 denon mc6000
please help

im using win 7 Cross dj2.6 denon mc6000
please help
