VD doesn't capture in "minimize mode"

[ericcartman1]

When I try to capture video using VD and the program's windows is
minimized, the audio is captured but the video is staying on the
first frame.

My system:
Pentium 2.8Ghz (HT)
Gigabte GA81K1100
Asus Radeon A9600XT
512MB Memory

I tried different codecs (divx, xvid) and few mods of virtual dub
(original, mod, vcr, freeze), however, problem still exists.

Is it a VD bug? or does "real time" capturing and encoding can be
performed only when the video is running on screen?

Thanks :)