Dv8000 w/ xb2000 Expansion Base, Win 7 RC1, and No Sound

I have a HP dv8000 CTO notebook and use a HP xb2000 Notebook Expansion Base.  With a complete new install of Windows 7 RC1 I have had significant problems getting sound to work.
I've finally been able to get the base dv8000 sound to work, but have not been able to get the sound to work via the Exapansion Base.  When the expansion base connector is plugged in  to the notebook, it kills the notebook sound, but does not pass the sound to either the expansion base or the expansion base headphone jack.  I realy don't want to ust use the Expansion Base as a notebook holder, but don't want to not have sound.
Does anyone have a solution or test process to diagnose the issue?
Cap
This question was solved.
View Solution.

I finally was able to solve this by installing an old service pack, HP SP33443 with Conexant drivers.  It appears to have been updated for Vista and works with and without the Expansion Base xb2000.
Cap

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