Sound lags ONLY in crossfire

I just bought a new sound card(creative USB Sound Blaster X-Fi Go) and everything works perfect except crossfire. Sound lags even in the start menu and in the server selection not only in the game.

This is a crossfire issue cause this only happens in crossfire. Ive checked all options and settings such as hardware acceleration etc just in case, but everything works fine.
thank you in advance for any help provided