CDJ control: Xone 23c with CDJ's 1000mk3

Sorry guys if this is already a known topic.. But I have no connection between CDJ's and Mac (Cross). My setup:
Mac to Mixer Xone 23c via USB, MiXer to CDJ's 1000mk3 with audio cinch. Timecode CD's are in the CDJ's (wav files), but you hear only a whistle/pipe tone. Is this normal?
How I can start a track now with the CDJ's? Decks are activated in the settings. Control medium: MV CD.
Thanks a lot...
Mac to Mixer Xone 23c via USB, MiXer to CDJ's 1000mk3 with audio cinch. Timecode CD's are in the CDJ's (wav files), but you hear only a whistle/pipe tone. Is this normal?
How I can start a track now with the CDJ's? Decks are activated in the settings. Control medium: MV CD.
Thanks a lot...