pulseaudio cannot show my Fast track c400, but alsamixer.

[lzylong@xxxxxxxxx (gMAIL)]

It seems work...

[Lzy1 at Lzy ~]$ cat /proc/asound/cards
  0 [SB             ]: HDA-Intel - HDA ATI SB
                       HDA ATI SB at 0xfe8f4000 irq 16
1 [C400           ]: USB-Audio - Fast Track C400
                       M-Audio Fast Track C400 at usb-0000:00:13.2-3, 
high speed

but I cannot find fast track c400 on the sound setting panel.