iMultimix8 USB - HELP!

[racka11]

4 days ago, I bought an brand new mixer: iMultimix8 USB. When I connect it via USB into my Mac computer and install drivers was everything OK. Computer recognize mixer and my first job I recorded successfully. But the next day I loosed USB connection without changing anything. Now for 2 days I am reinstalling/installing drivers, switching ON/OFF all devices, restarting, plug IN/OUT the USB cable for 100 times, reading manuals step by step, searching web, ignoring my Wife and at the moment I am crying! But I just couldnt get the signal via USB anymore. I was contact Alesis help center, but no answer from there.
I am using: iMac 24", 4Gb, 2,7 with OSX 10.5.6. version.

On web I found drivers for OSX 10.5.6. version, but only for multimix16 USB device. Try with those drivers too, but the result is the same - Nothing.

Where is the problem?? Please help with any advice!

I got the signal, but now its gone! This could be nice song!

Best regards from Slovenia

Robert