I don't know about MSN, but Yahoo needs "DSP Group TrueSpeech codec" in
order to work according to what I've read. Lots of listings on the subject
via Google. I tried everything that was suggested, but nothing worked for me
on Vista.

My solution was to install Microsoft Virtual PC 2007, create a virtual XP
machine, and use Yahoo voice from there. It also worked well for several
pretty old apps that Vista didn't like at all.


Good luck ........

--
Of all the things I've lost, I miss my mind the most!
"nmhbh" <nmhbh@discussions.microsoft.com> wrote in message
news:EFF7D05C-89CD-44A4-9503-966641714C77@microsoft.com...[color=blue]
>I cannot receive sound on either of these two applications since getting
>Vista.
>
> Is there a compatibililty issue with these programs?[/color]