Dell Dimension 8250 VISTA: ADI 198x Integrated Audio driver for VISTA missing - please help

All:

 

    I am looking for a ADI 198x Integrated Audio Driver for Vista.   I recently upgraded to VISTA on my Dell Dimension 8250.   I have no sound still.   I've gotten past most of the upgrade issues, except for the audio driver.  VISTA continues to tell me that there is "no Audio Output Device installed".   In the Device Manager, the "Multimedia Audio Controller" is listed under "Other Devices" without any driver at all.

 

   I've tried several drivers I found around these forums, but all have failed.  I searched the DELL site and I can't tell if they even have a VISTA driver for this.  Has anyone had any success with this Audio Driver for VISTA?      Can anyone point me to where I can find one?

 

Thanks much,

Don