u46 mk2 does not work??

I bought the u46 mk2 sound card. Then i installed it with the cd which was deliverd with the soundcard. However, it does not work well. I also downloaded the most recent driver here (v 1.0.39) but this also does not work
Description of the problem:
the soundcard is not recognized by the computer. When i first install it, it works fine. As soon as i restart my PC, it only shows the task bar icon en has disappeared in the hardware overview of my PC. If i open the control panel of the soundcard, it says u46 v1.0.39 Disable. The panel has turned grey and i cannot move the faders anymore
I have tried various uninstalls en reinstalls, problem stays the same. Also usb ports have been varied to exclude that problem
HELP! Anyone any idea? it is driving me crazy
Description of the problem:
the soundcard is not recognized by the computer. When i first install it, it works fine. As soon as i restart my PC, it only shows the task bar icon en has disappeared in the hardware overview of my PC. If i open the control panel of the soundcard, it says u46 v1.0.39 Disable. The panel has turned grey and i cannot move the faders anymore
I have tried various uninstalls en reinstalls, problem stays the same. Also usb ports have been varied to exclude that problem
HELP! Anyone any idea? it is driving me crazy