Houston not responding


I’m using Cubase pro 8, and a Houston controler, on win 7 with a Tascam US-122MKII.

It was working fine for a while… but now the Houston is not responding. If I move a fader with the mouse in Cubase so the Houston move its hardware faders. But in the other way when I touch the Houston’s faders, nothing arrive in Cubase…

Any idea?

Thank you very much in advance!