The x32 doesn't have ADAT, it uses USB. I've checked compatibility with Sonar 6, and it doesn't look to be 100% compatible. The trick when working with DAW software and an interface, is to follow these rules:
It is a 3 way communication, which can make it tricky. Is it showing up in your I/O settings in Sonar? How about in Device Manager?
You didn't tell me that part, that is ADAT, but still the x32 isn't 100% compatible with Sonar. Not all interfaces work with all DAWs. Please answer my question, is it showing up in your i/o settings?