Makeavis chokes on BeHappy certified script

[Skelsgard]

I´ve tried to get stdin-out encoding with avisynth for a while now to no result.
I´m using Avisynth 2.5.6 with makeavis from milan cutka´s ffdshow (Aug 21 2006 build), and every time that I load this simple script (created by BeHappy), it chokes indefinitely until I kill the process, or it just doesn´t do anything (the process ends in 2 seconds outputting a 0Kb WAV). No advanced plugins or weird crap it´s being tried in the script as you can see. Just a simple load-and-decode.
NicDtsSource("audio.dts")
In the Audio decoder window, I tested with Avisynth enabled and disabled for AVIS.
BeHappy on the other hand, renders this script flawlessly, so does VirtualDub and Windows Media Player 6.4.
What am I missing here?

[bond]

moved

[Skelsgard]

So, checking, if I create a dummy video stream for the audio, it doesn't complain at all. Makeavis and avs2wav, both work properly.
a=BlankClip(475870,fps=1000)
b=NicDTSSource("audio.dts")
AudioDub(a,b)
So, what's up with that?

Cheers.