Pioneer ddj sb

Hi,

I just purchased a Pioneer ddj sb and now i am wondering why it wont work nicely with my Cross DJ for android.
When connected directly via otg to my nexus, Cross DJ finds the ddj. But when conncting it to a powered usb Hub and going that way to my tablet it wont work.
Theres a Video out which shows that this gonna work. And my second Problem: i can not precue with headphones plugged in the ddj. Anyone Could help please?

Any Suggestion Would be appreciate.

I didn't find right solution on the internet.

Reference:
http://forum.mixvibes.com/viewtopic.php?f=396&t=38453
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Thanks