Problème carte de son sur notebook gateway

Bonjour,
dernièrement j'ai du reformater mon portable ( gateway 6018gh) et j'ai installé window xp pro. Depuis je n'ai plus de son.... Je suis allé cherché les drivers nécessaire sur le site de gateway, mais rien... ca ne fonctionne tjr pas. est-ce que quelqu'un peu m'aider??

carte de son:
Audio
Sound support

* Conexant SmartAMCi Audio Modem Codec (AMC) CX20468-31
* AC'97 Revision 2.3 Compliant

window xp pro avec service pack 3


Mon portable :6018GH Notebook Specifications
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5192

Feature Specification
Processor and Core Logic
Processor options One Intel® Celeron™ M CPU 1.4 GHz

Determine Your Notebook's Processor Speed
Processor packaging Intel® socketable u-FCPGA
Level 2 cache 1 MB
Chipset-Northbridge Intel 855GME
Chipset-Southbridge Intel ICH4-M
Processor side bus speed 400 MHz
BIOS

* Phoenix BIOS
* 512 KB Flash ROM with Boot Block Support
* SMBIOS 2.3 support
* Advanced Configuration and Power Interface 2.0 (ACPI 2.0) support
* Wired for Management 2.0 (WfM 2.0)

System memory
Memory type 333 MHz DDR RAM
Memory expansion options

* Two 200-pin industry standard DDR-SODIMM socket, user accessible
* 1 GB maximum system memory

Determine Your Notebook's Memory
Video
LCD display panel

* 15.0-inch or 15.4-inch active matrix (TFT) LCD color display
* Maximum panel resolution: 1280 × 800 (15.4-inch) and 1024 × 768 (15.0-inch)
* Maximum color depth: 32-bit (16.7 million colors) at 1024 × 768 and 262,144 colors at 1280 × 800

LCD supported video modes

* XGA
* SXGA+
* WXGA

LCD maximum refresh rate 60 Hz
Controls

* Brightness level selectable through FN keys (up, down)
* Auto dim on battery and auto bright on AC power (selectable in BIOS)

External video Supports dual display and dual view
External CRT resolutions

* Supports standard IBM VGA compatible modes
* Maximum resolution: 2048 × 1538
* Maximum color depth: 32-bit colors

External CRT maximum refresh rate

* 85 Hz at 1600 × 1200
* 75 Hz at 2048 × 1538

Audio
Sound support

* Conexant SmartAMCi Audio Modem Codec (AMC) CX20468-31
* AC'97 Revision 2.3 Compliant

Note: This notebook does not have an internal microphone or SPDIF.
Volume controls

* Volume control keys on keyboard
* Software control provided through Windows®

Internal speakers

* Stereo speakers built into the front of notebook
* 1.0 W maximum output for each channel

Audio jacks

* Stereo headphone output
* Stereo microphone input

Communications
Modem features

* 56K v.90 modem
* Uses the RJ-11 jack on the right side of the notebook
* Supports Wake on Ring from S3 power mode

10/100 Mbps Ethernet interface features

* Integrated IEEE 802.3 (10/100 BASE-T) Ethernet interface
* Uses the RJ-45 jack on the right side of the notebook
* Supports Wake on LAN from S3 in battery mode and Wake on LAN from S4 and S5 in AC mode

Wireless Ethernet interface features (Factory installed option) Intel® PRO/Wireless IEEE 802.11b/g network card, Mini-PCI (Pentium® M models only)
-OR-
Broadcom IEEE 802.11b/g network card, Mini-PCI (Celeron™ M models only)

* FN+F2 keyboard combination toggles wireless networking
* Antenna: Uses factory-installed internal antenna assembly
* Operating channels: 11 selectable channels
* Security: 128 and 64 bit WEP encryption
* Operating Frequency: 2.4 GHz Direct Sequence Spread Spectrum
* Maximum Data Rate:
54 Mbps (IEEE802.11g)
11 Mbps (IEEE802.11b)

Input/Output (I/O)
Keyboard

* U.S. English keyboard
* Full-sized 86-keys
* 19 mm × 19 mm key pitch
* 3.0 mm keystroke

Pointing device

* Gateway EZ-Pad™ touchpad with vertical scroll
* 2-button design

Status indicators FN+F1 keyboard combination turns status indicators on and off.

* AC power
* Wireless Ethernet
* Caps lock
* Num lock
* DVD drive access
* Hard drive access
* Power/battery charge

Input/Output (I/O) ports

* Four USB 2.0 (4-pin)
* IEEE 1394 (4-pin)
* V.92, 56K Modem (RJ-11)
* 10/100 Ethernet (RJ-45)
* External monitor (VGA)
* Stereo headphone output
* Stereo microphone input
* PC Card socket (one Type II)
* DC input