avisynth not seeing things in plugin folder

[pjbiz]

Hi guys,
I'm having some problems with avisynth not recognizing things in it's pluggin folder. Here is my script:

SetMTMode(2,0)
LoadPlugin("C:\Program Files (x86)\DGIndex158\DGDecode.dll")
MPEG2Source("Lara & Keith.d2v")
hd2sd(interlaced=false, OutputColorSpace="YUY2")

I followed this tutorial step by step for hd2sd
http://bellunevideo.com/tutvideo.php?tutid=12

But when I open the script in virtualdub, its says
Avisynth open failure
Script Error: there is no function named "hd2sd"

Eventhough the files are in the pluggin folder.
Also it didn't recognize the MPEG2Source either and had the same message about no function named "MPEG2Source" That is why I added the LoadPlugin to the script.

Does anyone know why avisynth is not seeing things in its own pluggin folder on its own?

the hd2sd.avsi is what is in the pluggin folder.

Jason

[Inspector.Gadget]

What advantages does "hd2sd" (I've never heard of it) offer over doing things directly using one of the Resize functions and optionally cropping/denoising/sharpening?

[Keiyakusha]

What advantages does "hd2sd" (I've never heard of it) offer over doing things directly using one of the Resize functions and optionally cropping/denoising/sharpening?
This is just highly bloated thing that includes colorspace, colorimetry and general color conversions/corrections, deinterlacing, denoising, etc... etc... I believe this script even can make you a coffee. If this really so, this would be his bigger advantage.

By the way it cames with a bunch of plugins and some dll which I never used but as I understand it somehow related to plugins loading.