Sound in FreeBSD

[Алексей Михайлович]

I want play *.mp3 in to FreeBSD

My system data
uname -a:
 6.4-RELEASE FreeBSD 6.4-RELEASE #0: Wed Nov 26 11:43:51 UTC 2008     root at dessler.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  i386

my sound driver:
    snd_hda

    $ cat /dev/sndstat
    FreeBSD Audio Driver (newpcm)
    Installed devices:
    pcm0: <Intel 82801I High Definition Audio Controller> at memory 0xf3020000 irq 22 kld snd_hda   [20071129_0050] (1p/1r/1v channels duplex default)
pcm1: <ATI (Unknown) High Definition Audio Controller> at memory 0xf1010000 irq 17 kld snd_hda [20071129_0050] (mixer only)  

my steps for auto load :
 1 ee /boot/loader.conf
    #Sound Driver
    snd_hda_load="YES" (man snd_hda)
 2 reboot
 3 login
 4 kldstat
    result kldstat:
Id Refs Address    Size     Name
 1    7 0xc0400000 7c89e8   kernel
 2    1 0xc0bc9000 5c894    acpi.ko
 3    1 0xc8dcc000 2000     fire_saver.ko
 4    1 0xc948a000 12000    snd_hda.ko
 5    1 0xc949c000 1d000    sound.ko

sound driver was loader 

I run X server: startx 
  and....... the sound is not present

Next i press Ctrl+Alt+Backspace (down X)

Manually I do an unloading and loading
   $ kldunload snd_hda
   $ kldload snd_hda

After these actions all works

Why the such occurs 
Thanks