Vista - Recording/editing on vista with Audacity

Been playing with mixing fun stuff, with bits and parts from ewrywhere
in to a compilation of humor etc..

I used Audacity from http://audacity.sourceforge.org.
back on windows xp,

Now i run vista premium, same hardware/setup
but vista wont allow audacity to record whats being played from
the what ewer is currently playing.

Before i could record small bits, just by hitting record,
now its just blank. No recording, and ive checked
speaker settings, and playback, etc.

I fail to see what im doing wrong, cause it didnt previous
require specifik setup as it aparently do now.

/Martin