Hello!

I've owned a Fireface UC iterface for almost 2 years now. I've always been happy with it. It is currently the heart of my studio where I work.
The last 4 months I've been experiencing some trouble with it. Three times, the interface has just disappeared from the computer (MacBook Pro 15") and does not respond. 1 time this was fixed after several reboots and plugging in and out. But the 2nd time, I had to send it for repair, but in my fixing rage (customers standing and waiting for the card to start working in the middle of the mixing session) I managed to change the interface to PC mode, so I got a RTFM diagnose from the repair shop (Read The F'cking Manual) wchich never was the case. Now for the third time, the interface dissappeared, leaving me stranded 1 hour before a recording session with a band. I just went away to get some coffe and when I got back, the card was not responding any more. This issue it really a big deal, since you should be able to trust your equipment.

What can I do to fix this?

I have:
-rebooted computer
-switched everything on and off
-changed usb cable
-downloaded new drivers
-switched to pc mode and back to mac mode

This is not an acceptable problem.