Help with audio alchemy ddp1

Hi all!

Just bought second hand ddp1 Wich was spesose to work perfectly but I have some problem.

The first is that I can't install the USB driver on my computer. When I connect the dac it is not recognize and when I try to install it from elac website it said that the dac must be connected and then it can't continue..

I try 2 computers, updating the fw, playing with the dac inputs but nothing.

A second problem is with the volume control which goes mad.. and the third one is when I'm connecting my Allo digione signeture source (serving as room endpoint with dietpi)

To the dac it once in a while (few minutes) stop playing for a fraction of a second, make a 'clik' sound and the pll indicator is going red. Any idea of how to fix it? I tried to play files from the network and from tidal but same problem...

Try to connect with elac support, but they a really slow and don't very helpful...