USB Soundcard Issue - "Couldnt change sample rate"

Hey there,
I m using the free Version atm and I cant get Cross DJ to work with my USB Soundcard (Creative X-Fi). If I want to select the device in the audio setup it always fails "Cant change the sample rate". This result is: No sound device is selcted and if I choose the Soundcard again the message will appear again.
I tried it with different DJ Programms and there it does work
But I fell in love with the DJ Cross Programm.
Any ideas?
This is the message: http://abload.de/image.php?img=bildschi ... 1jge94.png
I m using the free Version atm and I cant get Cross DJ to work with my USB Soundcard (Creative X-Fi). If I want to select the device in the audio setup it always fails "Cant change the sample rate". This result is: No sound device is selcted and if I choose the Soundcard again the message will appear again.
I tried it with different DJ Programms and there it does work

Any ideas?
This is the message: http://abload.de/image.php?img=bildschi ... 1jge94.png