Not support for CT4730 chip?

Hi all:
  I've just installed FreeBSD 5.3rc2 on an old micron laptop. The
sound chip is detected, and snd_es137x.ko can be loaded succesfully.
But, no sound at all. ;(  Mixer is tried, but nothing is changed.
Since it works under NetBSD 1.6.2, I believe the hardware is OK.
  Dmesg and cat /dev/sndstat is here. Any ideas?

xwhu_at_fbsd:~/snd$ cat /dev/sndstat 
FreeBSD Audio Driver (newpcm)
Installed devices:
pcm0: <Creative SB AudioPCI CT4730> at io 0x1080 irq 5 kld snd_es137x
(1p/1r/10v channels duplex default)

Copyright (c) 1992-2004 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
        The Regents of the University of California. All rights reserved.
FreeBSD 5.3-RELEASE #1: Fri Nov  5 20:01:02 CST 2004
    root_at_fbsd.vividcouple.com:/usr/src/sys/i386/compile/xwhu
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel Pentium III (601.37-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x681  Stepping = 1
  Features=0x387f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PA
T,PSE36,PN,MMX,FXSR,SSE>
real memory  = 201261056 (191 MB)
avail memory = 187265024 (178 MB)
npx0: [FAST]
npx0: <math processor> on motherboard
npx0: INT 16 interface
acpi0: <PTLTD   RSDT> on motherboard
acpi_ec0: <Embedded Controller: GPE 0x9, GLK> port 0x66,0x62 on acpi0
Timecounter "ACPI-safe" frequency 3579545 Hz quality 1000
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x8008-0x800b on acpi0
cpu0: <ACPI CPU (2 Cx states)> on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
agp0: <Intel 82443BX (440 BX) host to PCI bridge> mem 0xf8000000-0xfbffffff at d
evice 0.0 on pci0
pcib1: <ACPI PCI-PCI bridge> at device 1.0 on pci0
pcib1: could not get PCI interrupt routing table for \\_SB_.PCI0.PCI1 - AE_NOT_F
OUND
pci1: <ACPI PCI bus> on pcib1
pci1: <display, VGA> at device 0.0 (no driver attached)
isab0: <PCI-ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel PIIX4 UDMA33 controller> port 0x1000-0x100f,0x376,0x170-0x177,0x
3f6,0x1f0-0x1f7 at device 7.1 on pci0
ata0: channel #0 on atapci0
ata1: channel #1 on atapci0
uhci0: <Intel 82371AB/EB (PIIX4) USB controller> port 0x1020-0x103f at device 7.
2 on pci0
uhci0: [GIANT-LOCKED]
usb0: <Intel 82371AB/EB (PIIX4) USB controller> on uhci0
usb0: USB revision 1.0
uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
pci0: <bridge, PCI-unknown> at device 7.3 (no driver attached)
cbb0: <TI1410 PCI-CardBus Bridgecardbus0: <CardBus bus> on cbb0
pccard0: <16-bit PCCard bus> on cbb0
pcm0: <Creative SB AudioPCI CT4730> port 0x1040-0x105f,0x1080-0x10bf irq 5 at de
vice 12.0 on pci0
pcm0: <Creative EV1938 AC97 Codec>
pcm0: [GIANT-LOCKED]
pci0: <simple comms> at device 13.0 (no driver attached)
acpi_button0: <Sleep Button> on acpi0
acpi_button1: <Power Button> on acpi0
acpi_acad0: <AC Adapter> on acpi0
acpi_cmbat0: <Control Method Battery> on acpi0
acpi_cmbat1: <Control Method Battery> on acpi0
atkbdc0: <Keyboard controller (i8042)> port 0x64,0x60 irq 1 on acpi0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: [GIANT-LOCKED]
psm0: model Generic PS/2 mouse, device ID 0
ppc0: <ECP parallel printer port> port 0x778-0x77f,0x378-0x37f irq 7 drq 3 on ac
pi0
ppc0: Generic chipset (ECP/PS2/NIBBLE) in COMPATIBLE mode
> at device 8.0 on pci0
ppc0: FIFO with 16/16/8 bytes threshold
ppbus0: <Parallel port bus> on ppc0
plip0: <PLIP network interface> on ppbus0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0
sio0: type 16550A
fdc0: <floppy drive controller> port 0x3f7,0x3f0-0x3f5 irq 6 drq 2 on acpi0
fdc0: [FAST]
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
orm0: <ISA Option ROMs> at iomem 0xe4000-0xe4fff,0xc0000-0xcffff on isa0
pmtimer0 on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio1: configured irq 3 not in bitmap of probed irqs 0
sio1: port may not be enabled
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
Timecounter "TSC" frequency 601366618 Hz quality 800
Timecounters tick every 10.000 msec
acpi_cpu: throttling enabled, 8 steps (100% to 12.5%), currently 100.0%
ad0: 19077MB <IBM-DJSA-220/JS4OAC9A> [38760/16/63] at ata0-master UDMA33
acd0: DVDROM <TOSHIBA DVD-ROM SD-C2302/1I13> at ata1-master PIO4
wi0: <NEC Wireless Card CMZ-RT-WP> at port 0x100-0x13f irq 10 function 0 config 
1 on pccard0
wi0: using RF:PRISM2 MAC:HFA3841 CARD:HWB3163-SST-flash
wi0: Intersil Firmware: Primary (0.3.0), Station (1.3.4)
wi0: Ethernet address: 00:00:4c:1c:21:85
wi0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
Mounting root from ufs:/dev/ad0s1a