can't turn volume up (tv) (1 Viewer)

[scrappy.doo]

TV-Server Version: 1.0 RC2
MediaPortal Version: 1.0 RC2
MediaPortal Skin: Monochrome
Windows Version: Vista Ultimate SP1 - 32bit
CPU Type: Intel Core2Duo
HDD: 160 gig maxtor
Memory: 2gb
Motherboard: ASUS P5B-VM SE
Video Card: nvidia 7650gs
Video Card Driver: forceware 169.25
Sound Card: onboard
Sound Card AC3: onboard
Sound Card Driver: latest
1. TV Card: FloppyDTV
1. TV Card Type: DVB-C
1. TV Card Driver: 4.5n
MPEG2 Video Codec: Cyberlink PowerDVD 7.x
MPEG2 Audio Codec: Cyberlink PowerDVD 7.x
h.264 Video Codec: Cyberlink PowerDVD 7.x
Satelite/CableTV Provider: @Home/Ziggo
HTPC Case: Advance
Cooling: Zalman
Power Supply: standard 350W atx
Remote: Harmony 525
IR Receiver: eHome
TV: Panasonic TH-42PY70
TV - HTPC Connection: hdmi

Having a somewhat strange thingy going on over here. When watching TV I can't turn the volume up. I can turn it down, but not up. Only fix seems to be to go watch a movie and turn the volume up there since that strangely does seem to work. Any ideas on this freak accident?

 

[Paranoid Delusion]

MPConfig\general\volume, make sure Vista selected

 

[scrappy.doo]

awesomeness that did the trick (shouldn't installer detect your OS and set this setting automatically for you?)