my SB16 can't play midi files

["a" <huixf@tonghua.com.cn>]

I have Debian 1.2 and compile the kernel for SB16. Below is a section of .config

CONFIG_SOUND=y
CONFIG_SB=y
CONFIG_ADLIB=y
CONFIG_AUDIO=y
CONFIG_MIDI=y
CONFIG_YM3812=y
SBC_BASE=220
SBC_IRQ=5
SBC_DMA=1
SB_DMA2=5
SB_MPU_BASE=330
SB_MPU_IRQ=-1
DSP_BUFFSIZE=65536

Now I can play wav files and CD but can't play midi files using playmidi. Only a copyright notice appears. below is my mi* devices:
/dev/midi
/dev/midi00
/dev/midi01
/dev/midi02
/dev/midi03
/dev/mixer
/dev/mixer1

Pls reply to huixf@tonghua.com.cn because i'll leave the list in a minute.

PS: i love Debian and i love you!