connexant normally have issues with most things, they are cheap and always fail, so it you have that type of chipset it could be a big issue, its odd that windows picks it up and vagas dosent.
My first though is that vagas dosent support the card you may be using. try finding the driver and moving it to the system32 folders and the drivers folder, this may fix the issue. check the manfact's website for drvier updates and also search the internet for topics regarding custom drivers and software compatibility upgrades etc.,
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