Why do the cdj 2000 stop working sometimes when connected in Hid mode with Traktor 2?

[Maximal]

The last two nights,while djing at a local bar,the cdj 2000 stopped working whilst connected to my macbook pro and traktor 2.
Specifically,I was using the soundcard from the Djm-900 mixer and had connected the Cdj-2000 using them in advanced HID mode,when suddenly Traktor and the cdj's froze while the audio was still playing.
Turned off the cdj's and Traktor continued working fine,but when I turned back on could not link them to Traktor.They did not give me the option to select deck or anything.
I would be extremly greatful if you could help me,because I'll be djing there regularly and I neex to fix this issue.
Note that everything is up to date and was using a usb hub with no external power.
Thank you in advance for your help.

[makar1]

Did you connect the DJM to the same hub as the CDJs? I've had the same problem a couple of times, and keeping the DJM on its own dedicated USB port on the laptop fixed it.

[Maximal]

No,I had it on its own USB port.
I always have whatever sound card I am using on its own port.
Thanks though...

[Maximal]

No,I always try to have my soundcard on its own USB port.
Thanks though.

[makar1]

Ok, is your Traktor software up to date? Have you tried deleting all mappings from the Controller Manager?