Focusrite Solo Studio (GEN 2) / Recording Issue (Distorted)

Hi,

I have the following issue:

I try to record vocals with the Focusrite Solo Studio Generation 2 (USB). All the settings seem to be right (ASIO). But everytime I start to record the result is a distorted recorded voice. What could be the problem? I tested the audiointerface itself, without audition, the audio signal auf the microphone is clear and loud, so the audiointerface dont seem to be the problem. Anyone can help?

Thank you very much in advance.