i've been playing SSN'67 for a long time on this pc but now the sound in the main menu and in-game doesn't work!!!

DxDiag:
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Display Devices
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Card name: NVIDIA GeForce 7300 GS
Manufacturer: NVIDIA
Chip type: GeForce 7300 GS
DAC type: Integrated RAMDAC
Device Key: Enum\PCI\VEN_10DE&DEV_01DF&SUBSYS_22001682&REV_A1
Display Memory: 512.0 MB
Current Mode: 1280 x 1024 (32 bit) (75Hz)
Monitor: Plug en Play-monitor
Monitor Max Res: 1600,1200
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Sound Devices
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Description: SoundMAX Digital Audio
Default Sound Playback: Yes
Default Voice Playback: Yes
Hardware ID: PCI\VEN_8086&DEV_266E&SUBSYS_71281462&REV_05
Manufacturer ID: 65535
Product ID: 65535
Type: WDM