Yesterday I spent the whole day trying to install my new Ultralite MK3 Hybrid into my MacbookPro 2012, but couldnt achieve that

I connect it via USB port, so using also the dc power supply.
Nothing happened. Seems like the interface its not detected by the mbp.
In fact, when I open AudioDesk, it appears:
"No audio hardware was found. [MotuAudioSystem Mas MasCoreAudioDeviceSet.cpp 139 [58:0]"
At the Ultralite LCD screen I can read how it initializes:
Loading AutoRoute....Done
Loading Cue Mix.... (then a kind of snap or click sounds)
Meter 48 (blinkin a couple of times and keeps on the screen).
If I open CueMix FX, the "Devices" tab is empty.
If I open Motu Audio Setup, I can not see the Ultralite mk3 installed.
It does the same start either if its connected to the laptop or not, nothing seems to be different in both cases.
I dont know what more may I try.
Of course I've download the lastest drivers from the official website, I've also updated my Mac OsX (used to have 10.4.8 and now 10.9.2, doesnt work in both versions).
My MBP is a mid2012 with an i7 @ 2.9 Ghz, 8GB DDR3, SSD of 256GB and two USB 3.0 ports.
I hope someone can help me. I'm a bit frustrated with this issue.
Thank you for your time.
Kind Regards,
A.