Problem with AD1885 on-board sound

[Deling Ren]

Hi all, I just got a new PC to install FreeBSD 5.1 on. The sound card is 
an AD1885 on an Intel D865GBF mother board. I can not seem to have it 
work. I added "device pcm" in the kernel configuration file and 
recompiled the kernel. But it seems that the kernel still can not detect 
the sound card ('dmesg | grep pcm' yields no result). Did I miss 
anything? Please help. Thank you very much. I did see this line in dmesg 
though:

pci0: <multimedia, audio> at device 31.5 (no driver attached)

Any input will be highly appreciated.

Deling