Reply to VCI-300 + TraktorPro 1.1 Soundproblems

Hi,

i've got the VCI-300 for abot 2 weeks. Now i wanna use TraktorPro in connection with my controller. And there is the problem.
Without the VCI, the outcoming sound of Traktor is OK. But when i connect my VCI and switch the soundrouting over the VCI the sound is terrible.
What can i do? i've already tested all adjustments, i believe.

Greetings

Andy