the volume control adjusted to 0 ( Cubase 6.5.5 / UR22

Hi Sync, thanks for your reply.
I think I understand what you mean, but this is not the problem I think. When I turn up the volume, the sound is dirty and doesnt sound nice at all, and after that it turns to level 0 again. I have tried to adjust in the mixer and in the VSTi . The sam problem occurs. I have forced Pro Agent One to make this happen ( go to level 0, and sometimes i dont have to do anything loud or advanced. It turns to 0. And sometimes i push the buttons like a hardrockdrummer, and when I stop. THEN the level turns to 0. Stange!!??