AFAIK (from forum on creative web pages) - for X-fi HD is not original creative asio driver. 

I have some problem as AllsWell - Creative SoundBlaster X-fi HD connected via USB to PC - no sound from Foobar2000 with Asio4all. I see, that foobar is playing, icon Asio4all in taskbar is OK, but I no hear any sound. (with WASAPI I have playback error - some as AllsWell). Nothing from this...