USB modprobe driver problem.

Hi,
I try to load audio usb driver and I have an error.
I use modprobe snd-usb-audio
and the kernel can't load the module : there is some unresolved symbol.

What can I do. Get the latest version of alsa and try to compile and 
install it ?
Or try to make this module work but I have no idea on how to make it.

Regard
Philippe Delrieu