Minitaur crashes

[absentmusic1]

Hi,
i read that other users had the same problem.
But i never read that someone fixed it or not.
My minitaur crashes every second or third time i use it with logic 9 External Instrument over USB.
On a mac pro.
Everything runs fine.
But somtimes (most times) in a good run, i turn the LFO speed or filter cut of
and the MT crashes on the last tone and play the last note all the time.
I have to switch the unit out and in, usb out and in and it works again for some minutes.
I love the minitaur sound, but with this problem i cant have a good workflow.
And think to send it back.
Can someone help me ?
(No i want use the midi, because of automation from the mt to logic, the editor, less cables)
The good integration over USB was the reason to buy it.
And know i cant use it ?
Is there a way to fix the problem ?

[absentmusic1]

Seems that the problem realy was an usb extension.
NO hub, only an extenson cable was reason for the crasches.
Without he crashes not so often.But somtimes.
Now that im able to save presets correctly and have less crasches i can work with the unit.