Vaio VGN-FZ31M vista ultimate 64 bit install, problems with HDMI

[ghemul]

I have set up a clean install of Vista Ultimate 64bit on my notebook, but I keep getting a weird problem.

When I connect my notebook to a LCD TV, video works fine, but I have no audio, and can't switch it from the sound options, there the HDMI audio has the message "Not plugged in", even though it is.

thanks!

[ghemul]

anyone ?
I have to mention that the hdmi audio worked in the original preinstalled configuration.

[Blencogo]

Are you using the IDT driver version 6.10.5614?

ftp://ftp.vaio-link.com/PUB/DOWNLOADS/ST/D/AUD/STDAUD-01487701-UN.EXE