Soundcard Creative X-Fi XtremeMusic not detected

Sound card not detected.

% cat /proc/asound/cards
 0 [Intel ]: HDA-Intel - HDA Intel
                      HDA Intel at 0xefffc000 irq 16

% aplay --list-devices
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

% lspci -vvnn
00:1b.0 Audio device [0403]: Intel Corporation 82801G (ICH7 Family) High
Definition Audio Controller [8086:27d8] (rev 01)
        Subsystem: Dell Unknown device [1028:01de]
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR+ FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 0, Cache Line Size: 64 bytes
        Interrupt: pin A routed to IRQ 16
        Region 0: Memory at efffc000 (64-bit, non-prefetchable)
[size=16K]
        Capabilities: [50] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA
PME(D0+,D1-,D2-,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [60] Message Signalled Interrupts: Mask- 64bit+
Queue=0/0 Enable-
                Address: 0000000000000000 Data: 0000
        Capabilities: [70] Express Unknown type IRQ 0
                Device: Supported: MaxPayload 128 bytes, PhantFunc 0,
ExtTag-
                Device: Latency L0s <64ns, L1 <1us
                Device: Errors: Correctable- Non-Fatal- Fatal-
Unsupported-
                Device: RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop+
                Device: MaxPayload 128 bytes, MaxReadReq 128 bytes
                Link: Supported Speed unknown, Width x0, ASPM unknown,
Port 0
                Link: Latency L0s <64ns, L1 <1us
                Link: ASPM Disabled CommClk- ExtSynch-
                Link: Speed unknown, Width x0

05:02.0 Multimedia audio controller [0401]: Creative Labs SB X-Fi
[1102:0005]
        Subsystem: Creative Labs X-Fi XtremeMusic [1102:1003]
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR+ FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 64 (1000ns min, 1250ns max), Cache Line Size: 64 bytes
        Interrupt: pin A routed to IRQ 3
        Region 0: I/O ports at dce0 [size=32]
        Region 1: Memory at e7c00000 (64-bit, non-prefetchable)
[size=2M]
        Region 3: Memory at e0000000 (64-bit, non-prefetchable)
[size=64M]
        Capabilities: [40] Power Management version 2
                Flags: PMEClk- DSI+ D1+ D2+ AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [50] Message Signalled Interrupts: Mask- 64bit+
Queue=0/0 Enable-
                Address: 0000000000000000 Data: 0000

% tail -2 /proc/asound/oss/sndstat
Mixers:
0: SigmaTel STAC9200

% amixer
Simple mixer control 'Master',0
  Capabilities: pvolume pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Mono:
  Front Left: Playback 30 [97%] [-1.50dB] [on]
  Front Right: Playback 30 [97%] [-1.50dB] [on]
Simple mixer control 'PCM',0
  Capabilities: pvolume
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 255
  Mono:
  Front Left: Playback 255 [100%] [0.00dB]
  Front Right: Playback 255 [100%] [0.00dB]
Simple mixer control 'Capture',0
  Capabilities: cvolume cswitch
  Capture channels: Front Left - Front Right
  Limits: Capture 0 - 15
  Front Left: Capture 14 [93%] [21.00dB] [on]
  Front Right: Capture 14 [93%] [21.00dB] [on]
Simple mixer control 'Capture Mux',0
  Capabilities: volume
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 4
  Front Left: 2 [50%] [20.00dB]
  Front Right: 2 [50%] [20.00dB]
Simple mixer control 'Digital',0
  Capabilities: cvolume
  Capture channels: Front Left - Front Right
  Limits: Capture 0 - 120
  Front Left: Capture 60 [50%] [0.00dB]
  Front Right: Capture 60 [50%] [0.00dB]
Simple mixer control 'Input Source',0
  Capabilities: enum
  Items: 'Front Mic' 'Line'
  Item0: 'Front Mic'

% asoundconf list
Names of available sound cards:
Intel

% cat /proc/interrupts
           CPU0 CPU1
  0: 180 0 IO-APIC-edge timer
  1: 2 0 IO-APIC-edge i8042
  7: 0 0 IO-APIC-edge parport0
  8: 5 0 IO-APIC-edge rtc
  9: 0 0 IO-APIC-fasteoi acpi
 12: 4 0 IO-APIC-edge i8042
 14: 286021 0 IO-APIC-edge libata
 15: 0 0 IO-APIC-edge libata
 16: 1506880 0 IO-APIC-fasteoi ohci1394, HDA Intel,
nvidia
 18: 88 0 IO-APIC-fasteoi ehci_hcd:usb1,
uhci_hcd:usb2
 19: 0 0 IO-APIC-fasteoi uhci_hcd:usb3
 20: 433406 0 IO-APIC-fasteoi uhci_hcd:usb4
 21: 2599710 0 IO-APIC-fasteoi uhci_hcd:usb5
218: 1295017 0 PCI-MSI-edge eth0
219: 173076 0 PCI-MSI-edge ahci
NMI: 0 0
LOC: 6252585 6610690
ERR: 0
MIS: 0

-- System Information:
Debian Release: lenny/sid
  APT prefers gutsy-updates
  APT policy: (500, 'gutsy-updates'), (500, 'gutsy-security'), (500, 'gutsy')
Architecture: i386 (i686)

Kernel: Linux 2.6.22-12-generic (SMP w/2 CPU cores)
Locale: LANG=fr_CH.UTF-8, LC_CTYPE=fr_CH.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages linux-image-2.6.22-12-generic depends on:
ii coreutils [fileutils] 5.97-5.3ubuntu3 The GNU core utilities
ii dpkg 1.14.5ubuntu16 package maintenance system for Deb
ii initramfs-tools 0.85eubuntu19 tools for generating an initramfs
ii module-init-tools 3.3-pre4-2ubuntu3 tools for managing Linux kernel mo

Versions of packages linux-image-2.6.22-12-generic recommends:
ii grub 0.97-29ubuntu4 GRand Unified Bootloader

-- no debconf information